CGA320 CO2 Soda Cylinder Adapter Refill Connection Tank Filling Connector Kit Replacement Parts Item Type: CO2 Refill Connector Material: Aluminum Weight: Approx. 96g/3.4oz Total Length: Approx. 6cm/2.4in Thread Size: CGA320 // TR21-4 Applicable Countries: the United States, Canada, Brazil, Colombia, the Philippines... (are also called G1/2-14/0.825-14NGO in some countries) Color: Silver Instructions: 1. Use an appropriate wrench or wrench to connect the adjuster to the adapter. 2. Hold the gas cylinder firmly with one hand, and fix the adapter/regulator on the gas cylinder with a wrench or wrench. 3. The pin in the adapter will depress the valve on the cylinder to open the airflow. 4. Continue to tighten the adapter onto the cylinder until the cylinder slides into your hand.