Nylon Coil Zipper YKK 5 - Lt Weight Sleeping Bag Zipper or Tent Zipper Separating Bottom - Color Black By Each, Select Length (Length 120 inch) Nylon Coil Zipper YKK 5 Lt Weight Sleeping Bag Zipper or Tent Zipper Separating Bottom - Color Black By Each, Select Length The slider runs on two coils on each side; the "teeth" are the coils.