Features: 1The thread is G5/8-14 // TR21-4 the refill adapter can be used to refill a small CO2 cylinder from a larger CO2 cylinder. 2It is very soft and not easily broken strong and durable in use you can use it for a long time. 3Adopts high quality stainless steel + brass + PTFE corrosion resistance more convenient to use. 4Exquisite workmanship excellent performance stable performance is a very practical accessory. 5The installation method is simple and practical and the old or damaged parts can be replaced directly. Specification: Item Type: Soda HoseMaterial: Stainless Steel + Brass + PTFEColor: As shown in the pictureLength: Approx.91.4cm/36inWeight: Approx.538g/19ozThread Interface: G5/8-14 // TR21-4How 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 gas cylinder5. After completion you can use the Soda machine.If you want to unscrew items from the machine:1. Close the atmospheric cylinder valve2. Press the button of the Soda machine to discharge the 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 Instruction Manual3 x Gasket Note: 1. This item only applies to gaseous carbon dioxide not liquid carbon dioxide. It can't use siphon carbon dioxide tank!!2. 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.