Constructed with high-grade aluminum alloys, the CO2 transfer adapter is firmly built to withstand considerable wear. It exhibits remarkable durability, promising long-term functionality and safety in handling CO2. It is an accessory designed for extended usage. The adapter features extensive compatibility, fitting perfectly with pink Quick Connect CO2 cylinder systems equipped with quick connection valves (no threads). It works seamlessly with all large CO2 tanks having W21.8-14 threads and gas cylinders with a backflow lock, such as the Duo, Art, Terra, Crystal 3.0, and E-Duo. Engineered with a pressure relief valve, this CO2 refill adapter simplifies control during use. Featuring a double seal design, it helps prevent gas leaks. For standard 425g CO2 cylinders, the filling time is approximately 30-45 seconds. After filling, load measurement allows you to determine if the cylinder is fully filled. With this CO2 refill adapter, refilling your CO2 cylinders is convenient and efficient. Save on cost and effort by refilling empty CO2 cylinders instead of replacing them, making it a practical accessory for your Terra, Duo, or Art water carbonator. The simplified process provides a cost-effective option for reloading CO2 tanks. The CO2 refill adapter is user-friendly, requiring only a few straightforward steps to connect to your pink CO2 cylinder. It enables quick and efficient refills without the need to visit a refill station. Material: Aluminum alloy. Color: Rose Red. Package Contents: 1 x CO2 Refill Adapter. Note: Light reflection and different displays may cause slight variations in the color of the item in the picture compared to the real thing. Measurement may vary by +/- 1-3 cm.