High quality carbon dioxide cylinder adapter, suitable for a variety of soda machines. Good sealing performance, no air leakage when connected with the cylinder, more convenient to use. Made of high hardness materials, and wear-resistant, long service life. The is electroplated, bright as a mirror, resistant, not easy to oxidize and rust. Type:3/8-24UNF Colour:Silver Material:Metal Package Contents: 1 x Aquarium CO2 Regulator 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.