Features: 1. Scope of Application: The CO2 quick adapter is specifically designed for all 60L CO2 cylinders with a TR21-4 male valve to connect to the soda maker. 2. Warm Tip: When using a CO2 quick adapter, insertion may take extra time; it is recommended to remove the base of the 60L CO2 bottle from the soda maker before inserting the bottle. 3. Applicable Model: The upgraded CO2 quick adapter for soda water bubbler is compatible with DUO, Terra, and Art soda makers. It allows connection of a soda maker to a standard blue carbon dioxide bottle. 4. Premium Material: The CO2 quick adapter is constructed from aluminum and brass, offering corrosion resistance, rust resistance, durability, and safety. It features a polished surface and reliable sealing performance. 5. Convenient To Use: With this upgraded CO2 quick adapter for soda water bubbler, users can choose their preferred carbon dioxide cylinder for use with their soda maker. 6. Easy Connection: This CO2 quick adapter enables connection of an older soda hose with a TR21-4 male thread to a newer soda maker. Specification: Item Type: CO2 Quick Adapter Upgraded for Soda Water Bubbler Material: Aluminum, Brass Weight: Approx. 53g / 1.9oz Thread: TR21-4 Package List: 1 x Adapter 2 x Gasket