36in Black CO2 Soda Hose Adapter Kit CGA320 TR21‑4 Dual Thread Good Sealing with Mounting Hardware Item Type: Soda Hose Adapter Kit Material: Stainless Steel+Aluminium AlloyLength: Approx. 36in/914mmTest Pressure (TP): 17000psi Working Pressure (WP): 6000psi Interface Diameter: Approx. 20.8mm/0.8in Thread Interface: CGA320 // TR21-4 Applicable Countries: The United States, Canada, Brazil, Colombia, the Philippines... (some countries also call it G1/2-14/0.825-14NGO)Weight: Approx. 430g/0.9lbs The replenishment adapter can be used to replenish a small carbon dioxide tank from a larger carbon dioxide tank. The supplementary adapter is American CGA-320 (G1/2). Make sure that the thread type of the carbon dioxide tank is the same. How e: 1. Screw the pin valve into the machine. 2. Screw the nut onto the carbon dioxide cylinder and tighten it with a wrench. 3. Connect the quick connector. 4. Open the valve of the large atmosphere bottle. 5. After completion, it can be used. If You Want To Unscrew Items From The Machine: 1. Close the atmospheric cylinder valve. 2. Press the button of the machine to discharge the remaining carbon dioxide (if you don't disconnect the connector according to this guide, the o-ring of the quick connector will blow off). 3. Disconnect the quick connector. 4. Unscrew the pin valve on the machine and unscrew the nut on the CO2 cylinder.