31" Jacket Zipper Medium Weight YKK #5 Antique Brass ~ Separating ~ 580 Black (1 Zipper/pack) 31" Jacket Zipper Medium Weight YKK #5 Antique Brass ~ Separating ~ 580 Black (1 Zipper/pack) YKK antique brass separating zippers are made from the highest quality metal. Thoroughly tested to ensure strength & reliability.The designers choice for the antique finish look..