One gauge shows pressure for carbonating and dispensing. The other gauge displays how much CO2 is left. Easy to use dial for pressure adjustment from min to max. Pressure safety relief valve which can be pulled to release pressure when disconnecting. copper body, accurate machining, chrome plated , more . Economy style flow meter regulator. Single stage piston design. Combination of regulator and flow meter as one unit. Polycarbonate flow tube and outer cover are impact for maximum durability. Compact construction. Designed for MIG & TIG applications and provide accurate regulator of gas flow. Dual scale gauge with unbreakable polycarbonate lens for durability. Due to the light of , the product picture has color difference. There is a color difference between the picture and the actual product, which does not affect the use Colour:Photo Color Material:Plastic+copper Package Contents: 1x Argons Pressure Reducer Only the above package content, other products are not included. Note: Light reflection 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.