36" Light Weight Jacket Zipper ~ YKK #5 Nylon Coil Separating Zippers - 841 Off White (1 Zipper/pack) 36" Light Weight Jacket Zipper YKK #5 Nylon Coil Separating Zippers 841 Off White (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.