Perfect Compatibility & Easy Installation: Designed for sparkling water machines including DUO, ART, TERRA, E-DUO/Crystal 3.0/Gaia, this CO2 quick adapter provides a secure connection to standard 60L CO2 cylinders with TR21-4 trapezoidal thread. Its split design allows for simple installation without removing the machine base or causing damage. Durable and Quality Material, Reliable Performance: Made from high-quality aluminum alloy, the adapter offers excellent corrosion resistance and durability. The robust build and effective sealing performance help protect against oxidation and rust, ensuring long-term reliability. Replaceable Accessories – Extended Use & Reduced Maintenance: The quick-connect fitting includes a replaceable rubber O-ring. If the ring becomes worn or loose, it can be easily replaced, enhancing longevity and minimizing maintenance needs. Cost-Friendly, Time-Saving Solution: This adapter enables continued use of existing CO2 cylinders without the need to replace the entire cylinder or appliance, helping save time and money. Material: Aluminum alloy Color: Rose Red Package Contents: 1 x CO2 Quick Adapter (other items not included) Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1-3 cm.