Totally reliable inflation valve features an extra large recessed push-button allowing easy operation. the smooth backplate gives protection from uncomfortable pressure loads and prevents cold air blasts through underclothing. The valve sits low on the chest making it less prone to snagging. Rotation is a key feature of this valve to meet the diver’s personal hose configuration. The valve is designed to rotate 350 degrees . Connected to your 1st stage via a 3/8″ UNF male coupling.