about coil zippers: polyester zipper teeth are made of coiled polyester monofilament. Previously nylon was used as teeth material so the name nylon zipper is still used though now the teeth are made of polyester. applications: these are commonly used in jackets, kids wear, spotswear, bags, pants etc. slider: for coil zippers we provide painted as well as electroplated sliders. variations: at fastek, we make variety of zippers such as neon zippers, multi-coloured zippers, silver/golden coil zippers, standard coil zippers and many more. sizes available: #5