Product Type: Quick CO2 Adapter for Soda Water Maker Fits: Compatible with DUO /Terra/ Art Soda Maker to external CO2 cylinders connection Material: copper colour: black Package Contents: 1 x Soda Maker direct Connector set 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. This cga320 to tr21-4 hose fit for standard CGA-320 large Co2 tanks and most soda machines. It is very easy to install, the system allows you to connect your / Machine to an external Non-Siphon Co2 Tank that has a CGA-320 Outlet Valve, like 5lb, 20LB or 50lb commercial Co2 tank. For better air tightness, please use a wrench to tighten the connection with Co2 storage tank. Fit for 60 L Co2 Cylinder with screw valve, With this quick adapter, you can continue to use traditional screw valve CO2 cylinders. This adapter can be used with almost all 60 L aluminium CO2 cylinders with screw valve from different suppliers The standard CGA-320 external hose is made of high-quality nylon + TPU + fiber material, which has the advantages of anti-rust, anti-, wear resistance, anti-aging, not easy to deform, etc. Through the upgrade design, the air tightness is improved and the problems of tube explosion and tube expansion are avoided. Working pressure meets 4500 psi. Our cga320 connector hose is 60inch long, which included a fastening fasteners to prevent the product from loosening and airtightness. and it can withstand up to 100 °C (212 °F). The rubber ring is made of high quality material, which is safe and reliable. It will not transmit chemical taste to carbonated water, and it can provide better air tightness.