KKmoon Carbon Dioxide CO2 Argon Pressure Reducer Mig Tig Flow Meter Control Valve Regulator for Gauge Welding Weld Gas Welder Applicable for many kinds of gases, such as CO2, argon, etc. Reduces and controls the pressure of gases for Welding work. Adopts piston decompression method, gas of high pressure enters into the regulator and then low pressure releases. Can see numerical values of the LPM of carbon dioxide and argon from the transparent tube. The pressure gauge which shows how much gas is left in the tank goes from 0 to 3500 psi.