A kit for the investigation of lung capacity. The kit is comprised of four bags with holders. The bags are made from durable plastic and are silk-screened with graduations up to six litres in increments of 1/10th of a litre, i.e. 100ml.

The kit is useful for comparing how lung volume varies with height, age, etc.

• 4x durable calibrated plastic bags
• 4x mouth-pieces
• 4x rubber bands
• Supplied complete with instructions
• Eisco type LNG-KIT