This VIZZY one-way separating zipper is made for fashion sewing where the opening needs to separate fully, such as jackets, hoodies, and vests. It is 50 cm (20 in) long with #5 silver metal teeth and a tab pull, in a black colourway that pairs well with many fabrics and linings. Install it with standard zipper techniques and test the slider action before final topstitching to confirm smooth operation.