The YKK Vislon #10 Separating Zipper AutoLok Double Pull Plastic Slider 18 inch Black features durable molded plastic teeth with a 10mm chain width for heavy-duty strength in a lightweight design. Its separating zipper style includes double pull tabs and an auto-lock slider, offering flexible two-way access and reliable closure. The black molded tooth zipper is resistant to corrosion, chemicals, UV, saltwater, and sand, making it suitable for marine and outdoor use such as jackets, tents, bags, and covers. This plastic separating zipper is easy to install, weather resistant, and designed for lasting performance in outdoor apparel, sportswear, and marine gear.