Features: 1Carbon dioxide gas cylinder refill adapter soda tube easy to install and use. 2Total length is about 50in (125cm) which can directly replace old or damaged parts. 3Using stainless steel + brass material with good durability and reliability. 4W21.8-14 // TR21-4 thread connection good tightness and stable performance. 5Good sealing performance no air leakage when connected with the cylinder. Specification: Item Type: Soda HoseMaterial: Stainless Steel + BrassColor: BlueWeight: Approx. 360g / 12.7ozLength: Approx. 50in (125cm)Test Pressure: 8000psiWorking Pressure: 3000psiInterface Diameter: Approx. 21.8mm / 0.86inThread Interface: W21.8-14 // TR21-4Applicable Countries: South Korea Japan Britain Germany France Poland Norway Switzerland Russia Ukraine South Africa Sweden Chile Czech Republic Singapore (some countries are also called DIN477 /JIS m22-14)Refilling adapter can be used to replenish a small carbon dioxide tank from a larger carbon dioxide tank. The refill adapter is W21.8-14. Make sure that the thread type of the carbon dioxide tank is the same.How to Use:1. Screw the pin valve into the soda machine2. Screw the nut onto the carbon dioxide cylinder and tighten it with a wrench3. Connect the quick connector4. Open the valve of the large gas bottle5. After completion you can use soda machineIf you want to unscrew items from the machine:1. Close the large gas cylinder valve2. Press the button of the soda machine to discharge remaining carbon dioxide (if you do not disconnect the connector according to this guide the o-ring of the quick connector will blow off)3. Disconnect the quick connector4. Unscrew the pin valve on the soda machine and unscrew the nut on the CO2 cylinder Package List: 1 x Soda Hose1 x Manual2 x Spacer1 x Gasket Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. This item is only applicable to gaseous carbon dioxide not liquid carbon dioxide. It cannot use a siphon for carbon dioxide tanks.4. Please do not disconnect the quick disconnect under pressure. The quick disconnect O‑ring will be blown off. It is recommended to discharge the remaining pressure on the soda machine.