Description: Easy to Operate: This Soda Water CO2 Cylinder Adapter is designed for easy using. Simply connect the valve to a large CO2 tank (please confirm the interface model at first, common ones include W21.8, CGA320 and G3/4), tighten the exhaust valve, insert the CO2 bottle that needs to be filled into the round hole of the inflation valve, slowly open the switch of the large CO2 tank and wait for about 15-20 seconds for filling to complete.Secure Design: The horizontal inflation design ensures that there will be no risk of high pressure pushing out the gas bottle during inflation.Compact and Portable: With its small size and lightweight design, this Soda Water Connector is fit for users who need to regularly inflate their gas bottles.Material: Made from aluminum alloy and copper materials, this soda water CO2 bottle adapter carbonator refill ensures long term performance and reliability.Fit: The W21.8-14 (DIN 477)/JIS M22-14 model with a diameter of 21.8mm is generally suitable for countries like UK, Germany, France etc., while CGA320 model with a diameter of 20.8mm fits in countries like USA, Canada etc., and G3/4 model with a diameter of 26.4mm is applicable in Rus and other similar countries. Size Chart: 9cm/3.54inch Package Includes: As you choose1 Soda Water CO2 Cylinder Adapter OR1 Soda Water CO2 Cylinder Adapter with Hose Note: Please allow slightly errors 1-2cm differences due to manual measurement.