ZipperStop Wholesale Authorized Distributor YKK&reg; 36" Light Weight Jacket Zipper ~ YKK #5 Nylon Coil Separating Zippers - 579 Dark Grey (1 Zipper/pack) ZipperStop Wholesale Authorized Distributor YKK 36" Light Weight Jacket Zipper YKK #5 Nylon Coil Separating Zippers 579 Dark Grey (1 Zipper/pack) The slider runs on two coils on each side; the "teeth" are the coils. YKK's perfect zipper for light weight outerwear jackets.