36" Vislon Zipper ~ YKK #10 Molded Extra-Heavy Separating - 578 Medium Grey (1 Zipper / Pack) 36" Vislon Zipper ~ YKK #10 Molded Extra-Heavy Separating 578 Medium Grey (1 Zipper / Pack) Very popular for active wear and outerwear. Great for ski jackets. Made from the finest quality plastic to ensure extra strength & reliability.