Baoblaze Cga320 CO2 Cylinder Refill Adapter Repair for Tank Bottle Maker Filling 36 inches.This CO2 Cylinder Refill Adapter is simple to use. First, screw the adapter onto a commercial CO2 cylinder, then attach an empty bottle to the adapter. Open the valve of the large cylinder and wait for about 15-20 seconds until the steel bottle is fully charged. Close the valve, release any remaining gas through the exhaust screw, and check your refill adapter.When using this product, ensure that the sealing device is in its correct place. Upon receiving your bottle refill adapter, make sure it's used on its correct side with proper sealing.The CO2 large cylinder can only be installed on side of this device, make sure you place your bottle into its hexagonal side.Made from sturdy brass material, this refill adapter is designed for long term use.This Bottle Connector features a Type 1 thread (outlet valve diameter 21mm) and for CGA320 CO2 tank valves.CGA320 CO2 Cylinder Refill Adapter Hose. CO2 Refill Adapter Fill Station Connector Kit. Machine Accessories Filling Tank Bottle. CO2 Cylinder Machine Bottle Connector. CO2 Refill Adapter with Hose for Filling .