Co2 Cylinder Thread to Tank Thread G1/2-14 Convert Adapter Co2 Cylinder 3/8-24UNF Thread To Tank Thread G1/2-14 Convert Adapter Threads: 3/8-24UNF female to G1/2 male. Converts Co2 thread to 0.825 inch-14 / G1/2-14(CO2 cylinders). 3/8-24UNF CO2 instead CO2 cylinder as your CO2 source. Colour:As Shown Material:Metal Note: Item not include CO2 Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Due to different product batches, the appearance , which does not affect the use Package Contents: 1 * 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.