1W21.814 // TR214 thread, tight connection, good sealing performance. 2The installation method is simple and is used to connect the gas cylinder and inflate. 3Made of selected highquality materials, it has good durability and stability. 4Excellent performance, beautiful and practical, no air leakage when connected with the cylinder. 5Carbon dioxide gas cylinder adapter, exquisite workmanship, long service life.Item Type: CO2 Refill AdapterMaterial: BrassWeight: Approx. 380g / 13.4ozTotal Length: Approx. 7.8cm / 3.1inThread: 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)Purpose: It is the valve of the gas cylinder of the soda water machine/bubble water machine, used to connect the gas cylinder/inflate1 x Adapter6 x Gasket9 x Protective Ring1 x Right Angle Wrench1 x Brass Joint1 x Manual1.Please allow 0&8209;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.