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 the CO2 quick adapter, it may take extra time to insert the bottle. It is recommended to remove the base of the 60L CO2 bottle from the soda maker before insertion. 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 cylinder. 4. Premium Material: The CO2 quick adapter is constructed from aluminum and brass materials, offering corrosion resistance, rust resistance, durability, and safe operation. 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. Convenient To Connect: This CO2 quick adapter can also be used to connect 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 Product Material: Aluminum, Brass Weight: Approx. 53g / 1.9oz Thread: TR21-4 Package List: 1 x Adapter 2 x Gasket