Features: High quality: The adapter is made of high-quality metal materials. Its polished-surface and design ensure 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 soda water machines. Easy to install: With just a few simple step, your CO2 soda manufacturer can use this quick adapter together. Convenience: You can continue to use a large 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 soda manufacturers. Specifications: Material: Metal Size: As Shown in the Picture Package Includes: 1set Quick Adapter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.