High quality carbon dioxide cylinder adapter, compatible for quite a lot of soda machines. Good sealing performance, no air leakage when related with the cylinder, extra handy to use. Made of immoderate hardness materials, durable and wear-resistant, lengthy carrier life. The floor is electroplated, vivid as a mirror, resistant, difficult to oxidize and rust. Type:3/8-24UNF Colour:Silver Material:Metal Package Contents: 1 x Aquarium CO2 Regulator Only the above kit content, different item should not included. Note: Light mirrored image and diverse exhibits could cause the colour of the item within the picture slightly varied from the genuine thing. The dimension allowed error is +/- 1-3cm.