Design upgrade: version CO2 Tank Direct Adapter, With pressure gauge and air venting valve, The pressure gauge provides a clear view of the working pressure and residual gas, and the pressure relief valve allows air to be discharged when required, Easier to use. Scope of Application: Special for the Art Terra Soda Machine, Can help you connect large CO2 tanks to bubble makers, including Terra,DUO,Art, and Aqua Pink Carbonators Series of pink cans, But it can't make a connection to the Blue CO2 cylinder connect system. This item works CO2 only, not liquid CO2. can't use. manufacturing: CGA320 Soda Machine Co2 Adapter Quick Connector Hose, Made of high standard metal and caoutchouc, Anti-rust, anti-, wear-, anti-aging, not easily deformed, The rubber ring is made of food-grade rubber, Strong sealing, Ensuring and reliability, And it 't affect the taste of carbonated water. Cost savings: This upgraded version CO2 Tank Direct Adapter, Easy to install and simple to operate, Direct connection to large carbon dioxide tanks and soda makers, eliminating the need for frequent bottle changes and saving money on refills, For non-siphon CO2 tanks with CGA-320 outlet valve, It can be a good substitute for small CO2 exchange inflators/CO2 cylinders. Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:copper Package Contents: 1 x Co2 Adapter Quick Connector Adapter Hose 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.