Function: Allows you to connect the stream to an external CO2 tank, solving the difficulty of replacing an empty CO2 bottle Wide Range of Applications: Used for connection of Stream Terra water maker, large CO2 storage tank and machine pink CO2 cylinder system, not suitable for ""blue cylinder connection system"", compatible with most machines High-Quality Material: Made of high-quality aluminum, low density, high plasticity, corrosion resistance and oxidation resistance, strong and durable Ingenious Design: Ingenious thread design, can be installed quickly and easily, with strong practicability Easy to Operate: Easy and simple installation, can be directly connected without extra hardware, saving your time Material: aluminum colour: B-silver / A-gold<br><br>Package Contents: 1 x Connect Adapter 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.