The Soda Maker Expansion Co2 Adapter is compatible with for DUO Terra ART Soda Maker and can connect large CO2 tanks, such as 5 lb, 20 lb or 50 lb commercial CO2 tanks. Quick CO2 adapter hose connects to US standard CGA320 connection. Upgrade your soda maker with the Co2 Adapter - This system allows you to connect your soda maker to an external non-siphoning CO2 tank with a CGA320 outlet valve. Enjoy the advantage of easy CO2 refilling. Great versatility, say goodbye to expensive cylinder swaps The pink adapter of the hose has a working pressure of 5000psi and has the advantages of anti-rust, anti-corrosion, good sealing, wear-resistant, anti-aging, no odor, and not easy to deform. Screw the nut onto the commercial CO2 cylinder, screw the black needle valve into the soda machine, and open the valve for the large cylinder. The soda adapter hose is 60 inches long. No need to worry about the distance between the Co2 tank and the soda machine. Colour:As Shown Material:Metal Package