Metal zipper is a zipper whose teeth are made of copper, bronze or aluminum, which is stronger than nylon and resin zippers and is mostly used for jeans, jackets and backpacks. We provide customization and production service, according to the size of the zipper: 3#, 4#, 5#, 7#, 8#, etc. The size of the zipper changes according to the size of the microphone teeth. Because it is often used in jeans, jackets and backpacks, the size of the zipper is larger.