Pricing mentioned is for EA. Requires a minimum buy of 1 piece. Regulator Inlet Nipples with Filter, Oxygen, 1/4"(NPT), 3", Brass, CGA-540; Hazmat=False; Features=The inlet nipple provides fast and semi permanent connection, however not as permanent installations;They are made up of a brass material for maximum durability;Utilize this brass regulator inlet nipple for various gas regulators with a 1/4 NPT connection; StandardPack=1EA; CountryOfOrigin=US; Gas Type=Oxygen; Includes=Filter; Length=3 in; Material=Brass;