Stainless steel pressure reducing valve, adjustable output pressure 0-5KG Low pressure gauge: 0-10kg/cm², showing carbon dioxide output pressure. High pressure gauge: 0-100kg/cm², showing the pressure value of carbon dioxide in the bottle. When the pressure exceeds the maintenance pressure, the safety valve automatically open. Filter element. The polymer microporous filter element can effectively block and absorb impurities in the generated gas. Name: Triple Filter Element Stainless Steel Valve Low pressure gauge: 0-10kg/cm² High pressure gauge: 0-100kg/cm² The actual product may have slight color difference or difference, which not affect the use Colour:Black+Silver Material:Stainless steel Package Contents: 1 x Aquarium CO2 Generator Filter Value 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.