Zipperstop Wholesale YKK&reg; Sale 11" Jacket Zipper (Special Custom) YKK #5 Aluminum Metal - Medium Weight Separating - Color Black 580 (1 Zipper/pack) Zipperstop Wholesale YKK Sale 11" Jacket Zipper (Special Custom) YKK #5 Aluminum Metal Medium Weight Separating - Color Black 580 (1 Zipper/pack) Thoroughly tested to ensure strength & reliability. Aluminum Teeth.