Breathing tube (breathing apparatus)
A breathing tube is a flexible tube for breathing through, as part of a scuba set or other breathing apparatus or a medical oxygen apparatus or anaesthetic apparatus
They are wide, and usually corrugated to let the user's head move about without the tube pinching at kinks.
Each end usually has a screw connection. They may contain a one-way valve to keep the air or gas flowing the right way.
According to the expected usage, they may be pure rubber, or rubber reinforced with canvas or similar. If the canvas layer is outside.
