[Universal Compatibility]: This CO2 quick adapter is designed to be seamlessly compatible with a variety of machines, including compatible with DUO, compatible with ART, compatible with TERRA, compatible with E-DUO, compatible with Crystal 3.0, and compatible with Gaia. It fits standard 60L CO2 cylinders equipped with traditional TR21-4 trapezoidal threads, facilitating the connection between old CO2 cylinders and machines. [Convenient Split Design]: This adapter features a split design, allowing compatible with easy installation without removing the base of the machine. It is suitable compatible with models with compatible with QC Connect such as compatible with Terra, compatible with DUO, and compatible with ART, ensuring a secure fit without causing any damage to the device. A spare rubber ring is included compatible with maintenance. [Durable Premium Aluminum Alloy]: This CO2 adapter is made of premium aluminum alloy, which has excellent corrosion resistance, fire resistance, and moisture resistance. Its sturdy structure provides excellent sealing, anti-oxidation, and anti-rust percompatible withmance, ensuring long-term durability and reliability. [Cost-effective Solution]: By using this CO2 adapter, you can continue to use your CO2 cylinders compatible with both and old machines. Not only does this save you the hassle and expense of purchasing cylinders, it also extends the usability of your existing equipment. Colour:Photo Color Material:Aluminum Alloy Package Contents: 1 x Adapter 2 x Sealing Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.