Zippers can be divided into three categories according to specifications

According to specifications, it can be classified into the following three categories:

0 #, 2 #, 3 #, 4 #, 5 #, 7 #, 8 #, 9 #, 10 #, 20 # 30 #, the size of the model is directly proportional to the size of the zipper teeth.

According to the structure

① Closed zipper. The back code is fixed and can only be pulled apart from the front code end. When the zipper is fully open, the two chain straps cannot be separated by the back code connection. Suitable for ordinary bags.

② Open zipper. Install a locking component at the lower end of the dental chain without a back code. When the locking element is locked, it is equivalent to a closed zipper. Pull the slider against the locking element to separate it, and the chain strap can be separated. Suitable for clothing or items that often need to be opened.

③ Double zipper. There are two sliders that can be opened or closed from either end. Pull the two sliders against the locking component to separate them and fully open them. Suitable for large bags, bedding, tents, etc.