Feature: 1. Scope of Application: The CO2 quick adapter is specifically designed for all 60L CO2 cylinders, with a TR21 4 male valve connected to the soda maker. 2. Warm Tip: Using a CO2 quick adapter, the bottle will take a long time to insert, so it is necessary to remove the base of the 60L CO2 bottle from the for terra, for art, for duo soda maker and then insert the bottle. 3. Applicbale Model: The CO2 quick adapter upgraded for soda water bubbler is compatible for DUO, for Terra, for Art soda maker. It is an adapter that can connect a soda maker to a blue carbon dioxide bottle. 4. Premium Material: The CO2 quick adapter is made of aluminum and brass material, which is corrosion resistant, antioxidant, rust resistant, durable, safe, has a polished surface and good sealing performance. 5. Convenient To Use: With this CO2 quick adapter upgraded for soda water bubbler, you can decide for yourself which carbon dioxide cylinder to use with your soda maker. 6. Convenient To Connect: You can also use this CO2 quick adapter for soda water bubbler to connect the old soda hose with TR21 4 male thread to the new soda maker. Specification: Item Type: CO2 Quick Adapter Upgraded for Soda Water Bubbler Product Material: Aluminum, Brass Weight: Approx. 53g / 1.9oz Thread: TR21 4 Thread. Package List: 1 x Adapter2 x Gasket