and Designed to check gas on Tig or Mig torches. Flowmeter tester scaled from 0 - 25 litres per minute in one litre graduations, used for testing the gas at the Mig or Tig torch. Simply place the tester over the Mig or Tig gas nozzle and the gas is measured from the top of the ball. Disable the HF on Tig welders or you may get a shock. Release the Mig wire tensioner to stop the wire feeding when testing. Material:PC Color: Black Length: About 14cm Top Diameter: 1cm/0.39 inch : 1 Pc Package Contents: 1* Co2 gas meter Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.