Weight: approximately 60 grams (subject to actual receipt) Thread: TR21-4; CGA320 Function: Connect a TR21-4 or CGA320 threaded soda bottle to a DUO, TERRA, Art soda water machine using a quick connect cylinder Attention: If it is found that the TR21-4 or CGA320 threaded soda bottle cannot be placed into the machine when using a connector, the baffle at the bottom of the machine needs to be removed before the connector and cylinder can be placed into the machine together. Colour:silver Material:Aluminum Alloy Package Contents: 1 X joint 2 X sealing rings Only the above package content, other products are not included. Note: Light reflection 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.