1、Made of high quality brass material, durable and can be used for long time. 2、Easy to install and reliable to use, practical soda CO2 filling accessory. 3、Good sealing performance, no air leakage when connected with the cylinder. 4、It features exquisite workmanship, excellent performance and reliability. 5、Convenient to use, a perfect replacement for the damaged or broken one. 1 x Soda Valve3 x Gasket Condition: 100% Brand NewItem Type: Soda ValveMaterial: BrassThread Size: W 21.8-14 / TR21-4Thread Interface: Large carbon dioxide cylinder DIN477 or JIS m22-14 (Europe TR21-4, W 21.8-14)Applicable Countries: South Korea, Japan, United Kingdom, Germany, France, Poland, Norway, Switzerland, Russia, Ukraine, South Africa, Sweden, Chile, Czech Republic, SingaporeWeight: Approx. 348g / 12.3ozInstruction: 1. Connect the refill adapter to the large CO2 cylinder equipped with siphon firmly using an adjustable wrench. 2. Remove all residual gas from the cylinder to be refilled. 3. Freeze the empty cylinder in the refrigerator (recommended freezing for at least 3 hours). 4. Measure the weight of the cooled empty cylinder on the scale. 5. Connect the adapter to the siphon-equipped CO2 tank. 6. Open the CO2 tank valve slightly and charge the empty cylinder for 7 to 10 seconds. Can hear the incoming CO2 gas sound. 7. Remove weight from adapter and measure weight. If the empty cylinder weight is subtracted from the measured weight, it is the charge amount.