Zipperstop Wholesale YKK&reg; Brass Pant Zipper - YKK #4.5 Pants with Locking Slide ~ Closed End (Select Length/color) (Length 4 inch, 560 - Navy) Zipperstop Wholesale YKK Brass Pant Zipper YKK #4.5 Pants with Locking Slide Closed End (Select Length/color) YKK #4.5 Pants Brass is top quality medium weight zipper for both men's and women's pants. Brass Teeth.