What kinds of zippers

There are several kinds of zippers we commonly see：Nylon zipper, resin zipper, metal zipper 1 according to material classification. 

Nylon zipper: Invisible zipper, double bone zipper, woven zipper, anti-zip zipper, waterproof zipper, etc. 2. Resin zipper: gold (silver) tooth zipper, transparent zipper, translucent zipper, animal light zipper, bud shot zipper, diamond zipper 3. Metal zipper: aluminum tooth zipper, copper tooth zipper (brass, copper, bronze, copper, etc.), black zipper zipper classification 1. Closed zip 2 . Open end zipper (left and right insert) 3. Double closed zipper (X or O) 4. Double open zipper (left and right insert)