AGPtEK Argon CO2 Mig Tig Flow meter Regulator CGA580 Welding Weld 100% brand new Flow Meters, it fits argon, co2 and argon/co2 fixed. Perfect for Mig and Tig welding Brass Body 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.