Compact, solid one-piece body. Unique over-balanced, diaphragm design – as the diver descends, the over-balancing feature allows the medium pressure gas in the hose to increase at a rate faster than ambient. This results in superior performance at depth. 1 HP port and 3 MP ports are all angled downward. An environmental dry system keeps water out of the main spring chamber thus preventing ice buildup and keeping silt and contamination out. Maximum working pressure is 300 BAR (4350 psi).