IMAGE&reg; CO2 Valve Controller Mig Tig Flow meter Regulator Gas Welding Weld Brass Body. Preset: 30 P.S.I. Flowmeter Range 10-60 SCFH. Inlet connection: CGA580. connection: female UNF9/16 with 1/4" barbed fitting. The output flow is adjustable from 10 to 60 cfh (cubic feet per hour), and is indicated by a ball which moves up and down in the flow tube. Packaging Include: 1 x Pressure reducer, 1 x 1/4" barbed fitting