High quality: The adapter is made of high-quality metal materials. Its polished-surface and design good sealing and long-lasting performances. Suitable for universal cylinders design: The fast CO2 adapter is specifically designed for all 60L CO2 cylinders, with a TR21-4 external threaded valves for connecting water machines. Easy to install: With just a few simple step, your CO2 manufacturer can use this quick adapter together. Convenience: You can continue to use a 60L CO2 refill bottle, saving the trouble of replacing it in the stores or not having a new bottle available in the nearby market. With this quick adapter, you can decide for yourself which carbon dioxide cylinders to use in manufacturers. Colour:As Shown Material:Metal Package Contents: 1 x Adapter 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.