33" Vislon Zipper ~ YKK #5 Molded Plastic ~ Separating - 578 Medium Grey (1 Zipper/ Pack) 33" Vislon Zipper ~ YKK #5 Molded Plastic ~ Separating - 578 Medium Grey (1 Zipper/ Pack) Made from the finest quality plastic to ensure extra strength & reliability. Very popular for active wear and outerwear. Great for ski jackets.