Pricing mentioned is for EA. Requires a minimum buy of 1 piece. M1 Series Flow Gauge Regulators, Oxygen, 2-15 LPM, CGA540 Nut/Nipple, 3,000 psi; Hazmat=False; Features=Chrome-plated brass body with all brass high-pressure chamber;Internal reseating relief valve protects against overpressurization;Standard DISS 1240 outlet connection and plastic swivel hose barb;Chrome-plated brass body with all brass high-pressure chamber;Internal reseating relief valve protects against overpressurization; TestingAndApprovals=Tested to CGA Standards which include ignition testing;UL listed; StandardPack=1EA; CountryOfOrigin=US; Diaphragm Material=Neoprene; Filter Material=Sintered; Flow Range=2 - 15 LPM; Gas Type=Oxygen; Gauge Size=2 in; Inlet Connection=CGA-540 Nut and Nipple; Inlet Pressure=3000 psi [Max]; Length=2 in; Outlet Pressure=120.0 psig [Max]; Type=Single-Stage;