Extremely versatile unit! From 32 Degrees, this unit screws onto any CO2 tank and depresses the pin valve by screwing down the knob. Can be used with most 32 Degrees, Diablo and other Bottomlines & Drop Forwards with rails. Can also be used with Remote Systems or Fill Stations. Improved design is more compact and won"t leak! Lightweight anodized aluminum unit with female side hole threaded 1/8" NPT (accepts standard CO2 hose fittings).