The heavy duty rubber breathing tube is robust and durable and helps to prevent damage caused by snagging and sharp edges. Hose has a quick release system (QRS) so one handed connection and disconnection is possible. This breathing tube is only suitable for use with the Speedglas 9100 Air, 9100 FX Air & 9100 MP Headtops. (Not suitable for 9002 series headtops - if you would like to connect this hose to a 9002 headtop you will need an adaptor - click here to view adaptor).