COSTUMAKERS lightweight one-way separating zipper is designed for projects that need a zipper that opens from one direction and separates at the base. This zipper is 35 cm (13.8 in) in Black and uses #2.5 nylon coil for a slimmer zipper profile. The lightweight construction helps keep the build less bulky while clearly matching the listed length, colour, and separating style for sewing, repairs, or replacements.