This is the Black Rubber Regulator Low Pressure Hose. As the name indicates, this hose is designed for you primary regulator. The varying lengths are available for different setups and different diving goals, from recreational diving, to sidemount diving and tech diving.
The hose is available in the following lengths:
- 56cm / 22"
- 68cm / 27"
- 91cm / 36"
- 100cm / 40"
- 153cm / 5ft
- 210cm / 7ft