Zipperstop Wholesale YKK&reg; 36" Light Weight Jacket Zipper ~ YKK #5 Nylon Coil Separating Zippers - 918 Royal Blue (Pack of 1 Zipper) Zipperstop Wholesale YKK 36" Light Weight Jacket Zipper YKK #5 Nylon Coil Separating Zippers 918 Royal Blue (Pack of 1 Zipper) The slider runs on two coils on each side; the "teeth" are the coils. YKK's perfect zipper for light weight outerwear jackets.