Continuous Coil Zipper is sold by the foot. Full roll discount applies to a reel of 328.09 feet.
YKK® #10 Coil continuous Black Uretek water resistant 3/4" zipper chain/tape with a T4 shiny finish, 10CT4. Also known as AquaGuard® , a water repellent zipper. It is created by coating PU on the backside of a coil zipper.
10 coil = .417 in 27/64 | 
