Features Sturdy And Wear Resistant: This CO2 adapter is made of excellent brass and aluminum alloy materials for durability and is designed to ensure smoother working and more durable, reliable performance. Quick And Efficient: With the CO2 quick adapter, it will be easy to insert the bottle, so there is no need to disassemble the base where the 60L CO2 cylinder is located in the soda maker, it's convenient, quick and efficient. Compact And Lightweight: This quick connecting CO2 cylinder adapter is small and lightweight, which makes it very easy and practical to install and replace. Good Compatibility: This universal CO2 adapter has a good compatibility and is compatible with for DUO, for Terra, for Art, no need to remove the cover of the machine. Wide Application: This CO2 soda water bubbler adapter has a wide range of applications and can be used at home, restaurants, stores and more. Spec: Item Type: CO2 Quick Adapter Material: Brass, Aluminum Alloy Color: Purple Thread: TR21 4 Thread Purpose: To connect soda cylinders with TR21 4 thread to for DUO, for TERRA, for Art soda machines that use quick connect cylinders, you can continue to use traditional CO2 cylinders with screw valves thanks to this quick adapter. The adapter can be used with almost all 60 L aluminum CO2 cylinders with screw valve from different suppliers. How to Use: 1. Remove the CO2 cylinder and beverage bottle from your device. 2. Now screw the adapter (clockwise) onto the CO2 cylinder until a hissing sound is heard. Then turn the adapter (counterclockwise) back one part until the hissing stops. 3. Turn the device upside down. There is a semi circular thin plastic bridge on the bottom of the device. The bridges are separated with small forceps. This allows the cylinder and adapter to be inserted first. Then turn the device back on. 4. Remove the punch housing cover and tilt or lift the device slightly back. 5. First insert the bottom end of the cylinder into the device, then insert the cylinder head into the pink cylinder seat. Then turn the cylinder so that the hex on the cylinder valve points in your direction. 6. Now press the pink lever. Place the device directly on the table. 7. Replace the housing cover. 8. Your CO2 cylinder is now bubbling. packing list: 1 x CO2 Quick Adapter 1 x Gasket Note: If you find that you can't get the cylinder into the machine when using the connector to connect the TR21 4 threaded soda bottle, you will need to remove the stopper on the bottom of the machine to get the connector into the machine with the cylinder. Package List 1 x CO2 Quick Adapter 1 x Gasket