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