Get a more comfortable fit for your respiratory system with 3M Adflo Breathing Tube, 834016. This breathing tube self-adjusts its length from 525 mm to 800 mm to avoid a hanging tube that has potential to interfere with the user's working environment. Our breathing tube is designed for use with 3M Adflo Powered Air Respirator or 3M Versaflo Supplied Air Regulator V-500E. The Quick Release Swivel (QRS) allows for simple one-handed connection and disconnection of the hose between the air source and the helmet. The current program of welding helmets and face shields from 3M feature the QRS connection, but for the older 3M Speedglas Welding Helmet Series 9000 and 3M Protective Visors you need to add an adapter (533506). Extend the service life of your breathing tube by using a protective tube cover (834018).