This is the 5 gallon cap. We have many kinds of gallon caps.This gallon cap is three parts gallon cap. It’s about 9g, and it is recycling. These gallon caps are International Standard, the cap diameter is 55mm, the height is 34mm. The gallon cap top is with label , it can help the cap more clean. But with the gallon cap more and more popular, some new gallon cap with new design comes out. We can make new gallon cap mold depend on the customers requirement. Now the gallon cap can be 4.5g, and the height is 23mm.