Practical & Convenient to Use:Good sealing performance, no air leakage when connected with the cylinder, more convenient to use. Application:High quality carbon dioxide cylinder adapter, suitable for a of soda machines. Widely Used:It can be mounted on the cylinder of TR21-4 threaded soda cylinde to play the role of conversion interface. Premium Material & Durable:durable and wear-resistant, long service life. Corrosion-Resistant:The surface is electroplated, bright as a mirror, corrosion-resistant, not easy to oxidize and rust. Condition: Item Type: CO2 Cylinder Adapter Weight: . 76g / 2.7oz Female Thread Size: TR21-4 Male Thread Size: CGA320 Uses: The adapter is mounted on the TR21-4 threaded soda machine cylinder to act as a conversion interface Threaded Interface: carbon dioxide cylinder threaded CGA320 or 0.825-14NGO (US TR21-4, G1/2) Applicable Countries: USA, Canada, Brazil, Colombia, Philippines Colour:Silver Material:copper Size:Product Length: . 3.6cm / 1.4in Package Contents: 1 x Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.