Fit (Terra DUO Art) Pink Quick Connect Co2 Cylinder This fill adapter set is used to your (W21.8-14) external large commercial CO2 tanks like 5lb,20lb and 50lb, so that you can refill your DUO,Terra,Art quick disconnect -version Soda cylinder yourself . W21.8-14(DIN 477 / M22-14) connector Common in , JP, UK, Germany, France, , , Switzerland, Russia, Ukraine, South Africa, Sweden, Chile, Republic, Singapore etc. How to use: 1. Prepare the items you need: wrench, charging connector, large CO2 tank, empty quick-connect soda cylinder. 2. First loosen the exhaust screw, then use a wrench to install our charging connector to your (W21.8-14) large CO2 tank. 3. Rotate to put the empty bottle into the filling place. 4. Tighten the exhaust valve so that the cylinder is firmly locked. This is the most important step and the feature of our charging valve, so that fill the soda bottle more safely than other CO2 charging connectors. 5. Slowly open the large CO2 tank and refill the CO2 gas into the soda bottle. After about 15-20 seconds, the cylinder is completely filled. 6. Fill it up completely. Close the large Co2 tank valve first, then unscrew the exhaust valve to release the gas. Remove the soda bottle-done. 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. Specification:W21.8 Colour:As Shown Material:Aluminum stainless steel Package Contents: 1 * Cylinder Refill Fill Station Adaptor 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.