Features: 1CO2 connection valve adopts aluminum alloy which is durable and corrosionresistant. 2Integrated safety pressure valve with 3000psi pressure gauge easy to connect. 3The adjustable valve pin ensures compatibility with any cylinder valve changes. 4With gasket and sealing rubber rings good sealing performance no gas leakage. 58mm male head with filter screen easy to use can fill carbon dioxide into soda bottle. Specification: Item Type: CO2 Refill Adapter ValveMaterial: Aluminum AlloyColor: BlackPressure Gauge: 3000psiFemale Thread: TR21-4Weight: Approx. 116g / 4.1ozHow to Use:1. Use an appropriate wrench to connect the regulating valve to the adapter.2. Hold the cylinder firmly with one hand and fasten the adapter/regulator to the cylinder with a wrench.3. The pin in the adapter will depress the valve on the cylinder and open the gas flow.4. Continue to tighten the adapter on the cylinder. Package List: 1 x Connector Valve1 x Gasket1 x Rectangular Wrench2 x Sealing Rubber Ring1 x Screw