Features: 1Good sealing tight thread no gas leakage when connected to the cylinder. 2The installation method is simple and can be directly connected with the carbon dioxide tank regulator of the aquarium tank or the home brew beer barrel regulator cylinder. 3Made of high quality aluminum material it is durable wear-resistant high-pressure resistant and corrosion-resistant. 4Professional manufacturing exquisite technology stable inflation reliable quality long-term use. 5Small size it allows you to fill your own CO2 from larger bulk cylinders to smaller soda cylinders. Specification: Condition: 100% Brand NewItem Type: CO2 Tank RegulatorMaterial: AluminumColor: BlackThread: Female Thread TR21x4 to Male Thread W21.8-14Weight: Approx. 31g / 1.1oz Package List: 1 x Soda Cylinder Adapter1 x Gasket Note: 1.It can not work on and NZ soda bottle2.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.3.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.