Easy breathing high performing cold water regulator. The Onyx II, is the sealed version of the 2011 Scubalab Testers Choice regulator, the Onyx. With the same attractive finish and outstanding performance as the Onyx regulator, the Onyx II fills the need for those that find themselves in cooler water. Environmentally Sealed and Cold Water kit installed Balanced Diaphragm 5 LP Ports 2 HP Ports Ideal for cold water Lighter weight Downstream valve Balanced Diaphragm Dive/Pre Dive Venturi Control Diver Adjustable Breathing Sensitivity New Compact Profile Braided Hose Length: 30 in. (.76 m)