Sostream DUO/Terra/Art dedicated soda water machine machine connector The tube is 150 cm long and 6 mm in diameter Easy to connect, with quick connector for easy disassembly.(outlet valve diameter 22mm) DIN477 / W21.8-14 / m22-14 CO2 tank valve (, JP, UK, Germany, France, , , Switzerland, Russia, Ukraine, South Africa, Sweden, Chile, Republic, Singapore,etc) This item works CO2 only, not liquid CO2.It can't use siphon tube Co2 Tanks!! Please don't disconnect the quick disconnect under pressure, it will be blowed out the o ring in quick disconnect(female QD),suggest drain residual pressure on Machines. How it works: Screw the Nut to CO2 gas cylinder and tighten it by wrench. CQC External adaptor connect the quick coupler. CQC External adaptor connect into Soda machine. Open the valve of the large gas bottle. Done,you can use your Soda machine. if you want to unscrew the item from the machine: Close valve of the large gas bottle. Press button of Soda machine to drain residual Co2(if you don't follow this guide to disconnect the coupler, the o ring of quick coupler will be blowed out) Unscrew CQC adaptor from Soda machin and unscrew Nut from CO2 gas cylinder 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.