YKK Vislon #10 Separating Zipper AutoLok Double Pull Plastic Slider 84 inch Black features heavy-duty molded plastic teeth made from injection-molded polyacetal resin for a strong, lightweight zipper. Its double pull sliders with an auto-lock mechanism allow easy two-way operation while preventing unintentional sliding. Designed for outdoor and marine environments, this black 84-inch zipper resists corrosion, chemicals, UV damage, and harsh conditions like mud or sand, maintaining smooth function. The wide tooth design with color molded directly into the teeth prevents chipping or peeling, making it ideal for tents, bags, upholstery, jackets, and other rugged applications requiring durability and reliable separation capability.