Feature:1. TR21-4 to W21.8-14 soda cylinder connector adapter with high quality.2. Manufactured by aluminium alloy material, durable for long time use.3. Easy to install and reliable to use, a nice accessory for Sodastream.4. This adapter is resistant to pressure and wear, can be used for a long time.5. Professional manufacturing, compact structure and high reliability, practical to use.Specification:Condition: 100% Brand NewItem Type: Cylinder AdapterMaterial: Aluminium AlloyThread: Female Thread TR21-4, Male Thread W21.8-14Length: Approx. 3.6cm / 1.4inWeight: Approx. 31g / 1.1oz.Package List:1 x Adapter1 x GasketNote:1. Please allow 1-3 cm 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.