Ensure a more comfortable fit for your breathing system with the 3M Adflo 834016 breathing tube. This breathing tube adjusts its length between 525 mm and 800 mm to avoid the tube hanging down, which could potentially obstruct the user's working environment. Our breathing hose is designed for use with the 3M Adflo filtered air breathing hood or the 3M Versaflo V-500E compressed air control unit. The quick release swivel (QRS) can be easily attached and detached from the hose between the air source and the helmet with one hand.