Harris Specialty Gas Regulator, Single Stage, CGA-580, 0 to 15 psi, Use With: Argon, Helium, Nitrogen KH1007 | Zoro
Argon Ar Helium He Nitrogen N2 Cylinder Gas Regulators with Pressure Gauges Harris Type Model 25gx-145-580 200 Psi 4000 Psi - China Reducer, Pressure Reducer | Made-in-China.com