The ICUSB2321F 1-Port USB to Serial RS232 Adaptor Cable with FTDI chipset and COM Retention from StarTech.com converts an available USB 1.1 or 2.0 port into an RS232 serial DB9 port to connect, monitor and control your serial devices.

This compact adaptor features COM retention, allowing the same COM port value to automatically be reassigned to the port if the cable is disconnected and reconnected to the host computer, or if the system is rebooted. The ICUSB2321F uses the FTDI chipset which supports additional customisation, advanced features, and compatibility not necessarily offered by other solutions.

Compatibility with a broad list of Operating Systems including Windows®, Windows CE, Mac OS and Linux, makes this product easy to integrate into mixed environments.

It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 1.8m
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 115.2 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, 98SE, XP embedded, CE (4.2+)
• Ports: 1
• USB-powered
• System and cable requirements: One available USB 1.1 (or better) port
• Manufacturer's part: ICUSB2321F

This ICUSB2321FIS 1-Port FTDI USB to Serial RS232 Adaptor Cable with Optical Isolation from StarTech.com converts an available USB 1.1 or 2.0 port into an RS232 DB9 port that can be used to connect, monitor and control your serial devices.

The USB to serial adaptor features integrated optical isolation circuits and surge protection to protect your critical, sensitive control equipment against electrical damage, making it a viable solution for costly industrial serial devices.

The versatile FTDI chipset also supports COM retention, additional customisation/features, and compatibility not offered by most other solutions. Broad operating system compatibility including Windows®, Windows CE, Mac OS and Linux, makes this product easy to integrate into mixed environments.

It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 2.4m
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, 98SE, XP embedded, CE (4.2+)
• Ports: 1
• USB-powered
• Supported protocols: RS 232
• System and cable requirements: One available USB 1.1 (or better) port
• Product dimensions: 2.4m
• Manufacturer's part: ICUSB2321FIS

The ICUSB2321X Professional grade USB Serial Adaptor cable from StarTech.com converts a USB 2.0 port into an RS232 serial port allowing you to connect to, monitor and control serial devices.

A durable, single cable design makes this the perfect solution for mobile technicians who require serial connectivity. Once connected, the USB to serial adaptor retains assigned serial COM port values, allowing the same values to be automatically reassigned to the port provided by the adaptor in the event it is disconnected, then reconnected to the host computer.

This innovative adaptor offers a professional grade solution for connecting legacy or industrial RS232 serial devices to more modern computers, or computers with unused USB ports. It is perfect for connecting serial modems, barcode scanners or any device with serial sync through USB, eliminating the expense of upgrading the serial peripheral for USB compatibility.

It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 300mm
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 230.4 kbps
• OS compatibility: Windows® 8 (32/64bit), 7, Vista, XP
• Ports: 1
• System and cable requirements: One available USB 1.1 (or above) port
• Manufacturer's part: ICUSB2321X

The StarTech.com ICUSB2322F 2-Port USB to Serial RS232 Adaptor Cable with FTDI chipset and COM Retention converts an available USB 1.1 or 2.0 port into 2 RS232 serial DB9 ports to connect, monitor and control your serial devices.

This compact adaptor features COM retention, allowing the same COM port values to be automatically reassigned to the port if the cable is disconnected and reconnected to the host computer, or if the system is rebooted. Unlike most USB-serial adaptors, this uses the FTDI chipset, which supports additional customisation, advanced features, and compatibility not necessarily offered by other solutions.

This USB-serial adaptor is compatible with a broad list of Operating Systems, including Windows®, Windows CE, Mac OS and Linux, making this product the perfect solution for integrating into mixed environments. It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 1.8m
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, CE(4.2+)
• Ports: 2
• USB-powered
• System and cable requirements: One available USB 1.1 (or better) port
• Manufacturer's part: ICUSB2322F

The StarTech.com ICUSB2324I 4-Port Industrial USB to Serial Hub with DIN Rail Clips converts a single USB port into four RS232 serial ports, enabling you to connect to, monitor and control your serial devices.

With rugged metal construction, sturdy wall-mounting brackets and top-hat DIN Rail clips (included), this hub provides versatile mounting options and a robust solution for both harsh industrial environments and simple desktop installations.

This USB-powered adaptor also retains assigned serial COM port values once connected, allowing the same values to be automatically reassigned to the ports provided by the adaptor.

This product is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB B (4 pin) female
• Enclosure type: Steel
• Interface: Serial
• Max baud rate: 921.6 kbps
• Maximum data transfer rate: 921.6Kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, CE
• Ports: 4
• USB-powered
• Product dimensions: 150 x 66.5 x 26mm
• Manufacturer's part: ICUSB2324I

The StarTech.com ICUSB2328I Industrial 8-Port USB to Serial Hub with DIN Rail Clips converts a single USB port into eight RS232 serial ports, enabling you to connect to, monitor and control your serial devices.

With rugged metal construction, sturdy wall-mounting brackets and top-hat DIN Rail clips (included), this 8 port USB to RS232 Serial Hub provides versatile mounting options and a robust solution for both harsh industrial environments and simple desktop installations.

This USB-powered adaptor also retains assigned serial COM port values once connected, allowing the same values to be automatically reassigned to the USB serial hub ports.

It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Colour: Black
• Enclosure type: Steel
• External ports: DB-9 (9 pin, D-Sub) male, USB B (4 pin) female
• Interface: Serial
• Maximum data transfer rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, CE
• Plug type: M
• Ports: DB-9 (9 pin, D-Sub) male, USB B (4 pin) female, 8
• USB-powered
• Product dimensions: 180 x 100 x 43.2mm
• Manufacturer's part: ICUSB2328I

This ICUSB232DB25 USB to RS232 DB9/DB25 Serial Adaptor Cable (M/M) from StarTech.com lets you connect 9-pin (DB9) or 25-pin (DB25) RS232 serial devices to your laptop or desktop computer through a USB port, as though the computer offered an onboard serial port. The integrated 0.9m cable allows connection directly from the serial device to the computer without requiring additional cables.

A cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals, this high quality USB/RS232 Serial Adaptor cable includes a DB-9 to DB-25 adaptor for connection to varied serial equipment and is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 900mm
• Colour: Grey
• Connector type(s): USB A (4 pin) male
• Enclosure type: Plastic
• External ports: DB-25 (25 pin, D-Sub) male, DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Max baud rate: 230.4 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, ME, 98SE, XP embedded, POS ready 2009, embedded system 2009, CE 4.2/5.2, windows mobile 5/6, PocketPC 2003 / 2000
• Ports: DB-25 (25 pin, D-Sub) male, DB-9 (9 pin, D-Sub) male, 1
• Manufacturer's part: ICUSB232DB25

The StarTech.com ICUSB232FTN FTDI USB to Null Modem Serial Adaptor Cable (1-Port) converts an available USB 1.1 or 2.0 port into an RS232 Null Modem serial DB9 port, solving DCE/DTE conflicts directly, without requiring additional cross-wired serial cables or adaptors.

This compact adaptor features COM retention, allowing the same COM port value to automatically be reassigned to the port if the cable is disconnected and reconnected to the host computer, or if the system is rebooted. The integrated FTDI chipset supports additional customisation, advanced features, and compatibility not necessarily offered by other solutions.

The USB to Null Modem adaptor is compatible with a broad list of operating systems including Windows®, Windows CE, Mac OS and Linux, making it easier to integrate into mixed environments. It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 1m
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) female, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, 98SE, XP embedded, CE (4.2+)
• Ports: 1
• USB-powered
• System and cable requirements: One available USB 1.1 (or better) port
• Product dimensions: 179 x 33.5 x 16.5mm
• Manufacturer's part: ICUSB232FTN

The ICUSB232INT1 USB to RS232 Serial Adaptor from StarTech.com allows you to add an RS232 port to any desktop system equipped with an available USB motherboard header. Unlike standard USB to serial cables, this cable is designed for use inside the PC case, affording an entirely internal solution with no mess or extra adaptors needed.

This compact and simple USB adaptor offers a cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals and is backed by a 2-year warranty and free lifetime technical support.

• Bus type: Motherboard header
• Cable length: 600mm
• Card type: Standard profile (LP bracket included)
• External ports: DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Internal ports: IDC (10 pin, motherboard header) female
• Max baud rate: 115.2 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, 98SE, XP embedded, CE (4.2+)
• Ports: DB-9 (9 pin, D-Sub) male, IDC (10 pin, motherboard header) female, 1
• Product dimensions: 123 x 45 x 12mm
• Manufacturer's part no. ICUSB232INT1

The StarTech.com ICUSB232PRO USB to RS232 Serial DB9 Adaptor Cable with COM Retention offers a professional grade solution for connecting legacy or industrial RS232 serial devices to a laptop or desktop computer through USB, so eliminating the expense of upgrading serial peripherals for compatibility.

A time-saving and convenient USB/Serial solution, the adaptor retains assigned serial COM port values in nonvolatile memory, allowing the same values to be automatically assigned to the adaptor serial port if disconnected and reconnected, or disconnected from one USB port and installed in another.

A versatile connectivity solution that bridges legacy serial peripheral devices with newer USB-capable computers, the USB to Serial adaptor offers broad operating system compatibility including Windows®, Linux and Mac OS, for easy integration into mixed environments.

It is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 300mm
• Colour: Black
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10 (32/64bit), 8 / 8.1, 7, Vista, XP, 2000, ME, 98SE, CE 4.2, 5.2
• Ports: 1
• System and cable requirements: PC with an available USB 1.1 (or above) port
• Manufacturer's part: ICUSB232PRO

This ICUSB232SM3 3ft USB to Serial Adaptor Cable from StarTech.com lets you connect DB9 RS232 serial devices to your laptop or desktop computer through an available USB port, as though the computer offered an onboard DB9M connector.

Unlike typical USB to serial converter cables where the conversion takes place at the DB9 end, the ICUSB232SM3 features a converter chip on the USB end. Converting at the USB source overcomes the 15ft technical limit of USB cables, allowing for a much greater serial DB-9 extension cable.

Simple to install and use, this USB to Serial adaptor is a cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals. It is backed by a lifetime warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 900mm
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, ME, 98SE, CE 4.2, 5.2
• Ports: 1
• Manufacturer's part: ICUSB232SM3

The ICUSB232V2 1 Port USB to Serial Adaptor from StarTech.com converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.

Supporting data transfer rates up to 921.6 Kbps, this USB to serial cable is a convenient and cost-saving solution for providing serial connectivity to devices such as point-of-sale terminals, serial modems, industrial equipment, and a wide variety of other RS232 peripherals.

The USB to RS232 converter is easy to install and offers broad operating system compatibility, including Windows® 8, Linux and Mac OS®, for easy integration into mixed environments.

It is backed by a 3-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Connector type(s): DB-9 (9 pin, D-Sub) male, USB A (4 pin) male
• Enclosure type: Plastic
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000
• Ports: 1
• System and cable requirements: One available USB 1.1 (or above) port
• Product dimensions: 430 x 35 x 20mm
• Manufacturer's part: ICUSB232V2

The StarTech.com ICUSB422 6ft Professional RS422/485 USB Serial Cable Adaptor with COM Port Retention lets you connect RS422 or RS485 serial devices to your USB-enabled computer. The adaptor features a 9-pin (DB9) male serial connector as well as dipswitch controls for easy port configuration, and requires minimal software.

The serial adaptor is USB-powered, eliminating the aggravation of requiring an external power adaptor. With COM port retention, assigned port settings are saved, so you can disconnect and reconnect the adaptor with virtually no configuration required on the host computer.

The ICUSB422 is backed by a 2-year warranty and free lifetime technical support.

• Bus type: USB 2.0
• Cable length: 1.8m
• Colour: Black
• Connector type(s): USB A (4 pin) male
• Enclosure type: Plastic
• External ports: DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Max baud rate: 921.6 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, 2000, 98SE, XP embedded, CE (4.2+)
• Ports: DB-9 (9 pin, D-Sub) male, 1
• Manufacturer's part: ICUSB422

The PEX2S1P553B 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable from StarTech.com combines the functionality of Parallel and Serial cards, adding 2 RS232 serial ports and 1 parallel port through a single PCI Express (PCIe) slot.

Suitable for almost any computer, the card offers a low profile/half-height design and includes an optional full-height bracket. The included break-out cable uses a single connector on the card to deliver 3 ports, avoiding crowded connections that can occur with fixed/static ports. It is compatible with a broad range of operating systems including DOS, Windows® 7/Server 2008 R2/Vista/XP/Server 2003/2000/98SE (32/64 bit), Linux and Mac OS X.

The card also features a native single-chip design that provides improved speed and reliability while reducing the CPU load by as much as 48% over conventional (bridge chip) cards.

This product is backed by a lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Low profile (SP bracket included)
• Connector type: PCI express x1 male
• External ports: DB-25 (25 pin, D-Sub) female, DB-9 (9 pin, D-Sub) male
• Interface: Parallel, serial
• Max baud rate: 230.4 kbps
• Maximum data transfer rate: 250 kbps for serial and 1.5 Mbps for parallel
• OS compatibility: Windows® 10, 8/8.1, 7, Vista, XP, XP embedded, POS ready 2009, embedded system 2009, CE 5.0/6.0, 2000, 98SE, 95, DOS
• Ports: DB-25 (25 pin, D-Sub) female, DB-9 (9 pin, D-Sub) male, 3
• Product dimensions: 95 x 79 x 23mm
• Manufacturer's part. PEX2S1P553B

The StarTech.com PEX2S553 PCI Express serial card lets you turn a PCI Express slot into 2 x RS-232 (DB9) serial ports. Based on a native single chip design (no bridge chip), this 2-port serial adaptor card allows you to harness the full capability offered by PCI Express (PCIe), and reduces the load applied to the CPU by as much as 48% over conventional serial cards. The RS-232 adaptor card is compatible with a broad range of operating systems including Windows, Linux Kernel 2.6.11 and up, and MAC OS 10.4 and above.

Plus, the serial card includes a pair of optional half-height/low profile brackets that allow the card to be installed in any PCI Express slot, regardless of the size of the computer case.

Backed by a StarTech.com Lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Standard profile (2 x LP brackets included)
• Connector type: PCI express x1 male
• External ports: DB-9 (9 pin, D-Sub) male
• Internal ports: LP4 (4 pin, Molex large drive power) male
• Max baud rate: 460.8 kbps
• OS compatibility: Windows, Mac OS and Linux
• Product dimensions: 120 x 105 x 20mm
• Manufacturer's part no.: PEX2S553

The PEX2S5531P 2S1P PCI Express Card from StarTech.com turns a PCI Express slot into two RS232 (DB9) serial ports and one Parallel port. The adaptor card features a native PCI Express single chip design that allows you to take advantage of full PCI Express capability, providing improved speed and reliability while reducing the load applied to the CPU by as much as 48% over conventional serial cards which use a bridge chip design.

Compatible with a broad range of operating systems including Windows® 2000/XP/2003/Vista™/Windows 7/Server 2008 R2 (32 and 64-bit), Linux Kernel 2.6.11 and up and MAC OS 10.4, this 2 Port Serial 1 Port Parallel PCI-Express Card also features an optional low profile/half-height bracket that allows the card to be installed in virtually any computer case, regardless of the case form factor.

This product is backed by a lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Standard profile (LP bracket included)
• Connector type(s): PCI express x1 male
• External ports: DB-25 (25 pin, D-Sub) female, DB-9 (9 pin, D-Sub) male
• Interface: Parallel, serial
• Internal ports: LP4 (4 pin, Molex large drive power) male
• Max baud rate: 460.8 kbps
• Maximum data transfer rate: RS-232, 460.8Kbps
• OS compatibility: Windows® 10, 8/8.1, 7, Vista, XP, XP embedded, POS ready 2009, embedded system 2009, CE 5.0/6.0, 2000, 98SE, 95, DOS
• Ports: DB-25 (25 pin, D-Sub) female, DB-9 (9 pin, D-Sub) male, LP4 (4 pin, Molex power) male, 2
• Supported protocols: EPP, ECP, SPP, PS/2
• Product dimensions: 120 x 105 x 20mm
• Manufacturer's part: PEX2S5531P

The StarTech.com PEX2S553LP low profile/half-height PCI Express Serial Card turns a PCI Express slot into 2 x RS232 (DB9) serial connections. The card is constructed using a native single chip design that lets you harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge chip serial cards.

The PCI Express RS232 Serial Adaptor Card is compatible with a broad range of operating systems, including Windows, Linux Kernel 2.6.11 and up. It ships with a low profile/half-height bracket installed but includes an optional full profile bracket that lets you add 2 x serial ports to virtually any computer (regardless of the case form factor).

Backed by a StarTech.com Lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Low profile (SP bracket included)
• Connector type(s): PCI express x1 male
• External ports: DB-9 (9 pin, D-Sub) male
• Internal ports: LP4 (4 pin, Molex large drive power) male
• Max baud rate: 460.8 kbps
• OS compatibility: Windows, Linux
• Product dimensions: 105 x 80 x 20mm
• Manufacturer's part no.: PEX2S553LP

The PEX4S232485 4 Port PCI Express PCIe Serial Combo Card from StarTech.com lets you add two RS232, and two RS422/485 serial ports to your PC through a PCI-Express expansion slot.

This PCI express serial card is a single card solution which is compatible with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes.

The 4-port serial card includes both low and full profile brackets while the included breakout cable helps to avoid cluttered connections.

It is backed by a StarTech.com lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Standard profile (LP bracket included)
• Connector type(s): PCI express x1 male
• External ports: DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Max baud rate: 460.8 kbps
• OS compatibility: Windows® 10, 8/8.1, 7, Vista, XP, 2000
• Ports: DB-9 (9 pin, D-Sub) male, 4
• Supported protocols: RS-232, RS-422, RS-485 2-wire / 4-wire
• System and cable requirements: Available PCI express slot
• Product dimensions: 134 x 69 x 14mm
• Manufacturer's part: PEX4S232485

The PEX4S553 4-Port Native PCI Express RS232 Serial Adaptor Card with 16550 UART from StarTech.com lets you add 4 RS232 (DB9) serial ports using a single PCI Express expansion slot.

Based on a single-chip design, this 4-port serial adaptor card allows you to harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge-chip serial cards.

The RS232 Serial Adaptor Card includes 4 half-height/low-profile brackets, allowing the card to be installed into almost any PC case, regardless of form factor and is backed by a lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Standard profile (LP bracket included)
• Colour: Green
• Connector type(s): PCI express x1 male
• External ports: DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Max baud rate: 128 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP
• Ports: DB-9 (9 pin, D-Sub) male, 4
• Product dimensions: 130 x 120 x 19mm
• Manufacturer's part no.: PEX4S553

The Startech.com PEX4S553B 4-Port PCI Express Serial Card lets you add 4x RS-232 serial ports using a single PCIe expansion slot, with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot. The serial card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers.

The multi-port serial adaptor includes both full profile and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows®, Linux, and MAC OS.

Backed by a StarTech.com lifetime warranty and free lifetime technical support.

• Bus type: PCI express
• Card type: Low profile (SP bracket included)
• Connector type(s): PCI express x1 male
• External ports: DB-9 (9 pin, D-Sub) male
• Interface: Serial
• Max baud rate: 230.4 kbps
• OS compatibility: Windows® 10, 8 / 8.1, 7, Vista, XP, XP embedded, POS ready 2009, embedded system 2009
• Ports: DB-9 (9 pin, D-Sub) male, 4
• Product dimensions: 80.5 x 68.5 x 12mm
• Manufacturer's part no.: PEX4S553B