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Coils zipper are mostly made of nylon. Because the zipper teeth look like coils, some people call them coil zippers.
Nylon zippers cannot be pulled hard to cause the coil to deform and cannot be closed. They are usually used for curved objects, such as bags, luggage, sheets...etc.
♦︎ A is the teeth width, B is the teeth height, and C is the total width of the zipper.
