The 50-metre roll of 8 mm Barfell Divers Air Breather Hose is ideal for use in a recreational Hookah diving system, as well as an air-breathing hose for breathing apparatus in spray booths or sandblasting applications. It's Australian made and Pin pricked for your safety. This allows gases that permeate through the inner tube to be released through the cover of the house without ballooning or delaminating the hose causing blockages.