The Zeagle Onyx II Regulator outperforms many, much more expensive regulators with outstanding reputations, why? The internal structure allows direct airflow through the 1st stage, providing lower-turbulence for outstanding performance Features High performance environmentally and dry sealed Balanced, 5 LP port cold water 1st stage Balanced, adjustable 2nd stage with dual adjustment and heat-sink The Onyx II is available in yoke and Din (with or without adaptor) styles. 1st Stage Environmentally Sealed and Cold Water kit installed Balanced Diaphragm 5 LP Ports 2 HP Ports Ideal for cold water Lighter weight 2nd Stage Downstream valve Balanced Diaphragm Dive/Pre Dive Venturi Control Diver Adjustable Breathing Sensitivity New Compact Profile Braided Hose Length: 30 in. (.76 m)