Explanation of deviation of nylon coil size

Due to the elasticity of the nylon roll zipper, the size of the two zipper of the same specification may be slightly different. This is normal. As long as the deviation meets the tolerances specified in international standards (depending on the size of the zipper), this is acceptable. In addition, due to different manufacturing techniques involved in the molding, sewing and dyeing process, the tooth pitch of different batches of nylon roll zippers or different color nylon roll zippers may be different. Therefore, not all nylon coil zips assembled with each other can be perfectly matched, and the deviation is generally 1.5 cm or less.

In order to ensure better mutual assembly effect, the zipper to be fixed on the inner layer should be shorter than the zipper to be fixed on the outer layer, and the range is 0.3cm to 0.5cm. Otherwise, it will affect the aesthetics of the garment.