This regulator shut off adapter is easy to slide on slide off (black part) and allows a free flowing inflator to be shut off manually then turned back on when needed. This regulator shut off will fit Aeris, Atomic, Aqualung, Dacor, DiveRite, Genesis, Mares, Oceanic, ScubaPro, SeaQuest, Sherwood, Zeagle and all other standard regulators sold in the market (3/8" thread).