Zipperstop Wholesale YKK&reg; Sale 18" Nickel Metal Zipper YKK #5 Closed Bottom - Color 580 Black (1 Zippers/pack) Zipperstop Wholesale YKK Sale 18" Nickel Metal Zipper YKK #5 Closed Bottom - Color 580 Black (1 Zippers/pack) YKK nickel zippers are made from the highest quality metal. The designers choice for the finish look with the smoothest running zipper that is made. Color may vary on your monitor.