Features: 1. Scope of Application: The CO2 quick adapter is designed for use with all 60L CO2 cylinders featuring a TR21-4 male valve to connect to soda makers. 2. Warm Tip: Due to the design, inserting the bottle may take extra time. It is recommended to remove the base of the 60L CO2 cylinder from the soda maker before insertion. 3. Compatible Models: This upgraded CO2 quick adapter is compatible with DUO, Terra, and Art soda makers. It allows connection between a soda maker and a standard blue carbon dioxide cylinder. 4. Premium Material: Constructed from aluminum and brass, the adapter is corrosion-resistant, rust-resistant, and durable. It features a polished surface and ensures reliable sealing performance. 5. Easy to Use: This CO2 quick adapter gives users the flexibility to choose their preferred carbon dioxide cylinder for use with their soda maker. 6. Easy Connection: Enables connection of older soda hoses with a TR21-4 male thread to newer soda maker models. Specification: Item Type: CO2 Quick Adapter for Soda Water Bubbler Material: Aluminum, Brass Weight: Approx. 53g / 1.9oz Thread: TR21-4 Package List: 1 x Adapter 2 x Gasket