This option is useful for manufacturers of mattresses, bedding, furniture, covers, etc. Marks can define the angles or other places of the final product for precise fixing of the zipper during sewing.
Besides, there is an option to put letters and/or numbers on the zipper upon the customer’s request (e.g. to specify zipper length).
When you place an order for the zipper with marks you should point out the desirable distance, starting from the bottom stop, as shown on the picture below:
