Pricing mentioned is for EA. Requires a minimum buy of 1 piece. Cylinder Pressure Testing Gauges, Oxygen, Brass, CGA-540; Hazmat=False; Features=With Hand-Tight Nut; StandardPack=1EA; CountryOfOrigin=US; Diameter=2 in; Gas Type=Oxygen; Material=Brass; Pressure=3000 PSIG [Max]; Type=Gauge;