HARRIS, Single Stage, CGA 320 Inlet, Gas Regulator - 5KZ48|425-125-320 - Grainger
Harris 0 PSI to 125 PSI 2-Stage CGA 320 Brass, 1/4 in. Compression Fitting, Carbon Dioxide Specialty Gas Lab Regulator KH1137 - The Home Depot
Harris 201-100P-320i-G CO2 Brass Beverage Regulator 3002260
CO2 Cylinder Gas Regulator with Pressure Gauges Harris Type Model 801-10 0-200psi 0-16bar 0-4000psi 0-300bar W23-14 W22-14 - China Reducer, Pressure Reducer | Made-in-China.com