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. The split design enables simple installation without removing the machine base or causing damage. Durable and Quality Material, Reliable Performance: Made from high-quality aluminum alloy, the CO2 adapter offers excellent corrosion resistance, heat resistance, and moisture resistance. Its robust build and effective sealing performance ensure protection against oxidation and rust, delivering long-lasting 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 allows continued use of existing CO2 bottles without replacing the entire cylinder or appliance, helping save time and money. Material: Aluminum alloy Color: Rose Red Package Contents: 1 x CO2 Quick Adapter Note: The package includes only the items listed. Light reflection and screen settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1-3 cm.