Pricing mentioned is for EA. Requires a minimum buy of 1 piece. Brass Cylinder Adapters, From CGA-510 POL Acetylene To CGA-200 "MC" Acetylene; Hazmat=False; Features=Adapters should not be used as permanent installations;Use a brass cylinder Adapter to connect a regulator to a cylinder or other equipment when different CGA threads on the mating parts make a direct connection impossible; StandardPack=1EA; CountryOfOrigin=US; Gas Type=Acetylene; Length=3 in; Material=Brass;