Zipperstop Wholesale YKK&reg; 36" Zipper ~ YKK #7 Extra Heavy Duty Brass Separating ~ Black (1 Zipper) Zipperstop Wholesale YKK 36" Zipper ~ YKK #7 Extra Heavy Duty Brass Separating ~ Black (1 Zipper) YKK extra heavy duty brass separating zipper. Made from the finest quality metal to ensure extra strength & reliability. Virtually indestructible.