Easy reading pressure gauge.Calibrated for Argon, Helium and Carbon Dioxide gases.External safety pressure relief design.-carbonate flow tube and outer cover are impact resistant for maximum durability.Flowmeter is back pressure compensated to accurate readings when line restrictions are present.Applicable Gas:Argon gasMeasuring range 0-25 (MPa)Rated outlet pressure 0-25 (MPa)Rated flow rate 0-200 (m/ h)Ambient temperature 0-30 (Celsius)Colour:Silver+transparentSticker color: random color (black, redor green), don't accept the specified colorMaterial:Zinc alloyPackage Contents:1 x Gas regulatorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.