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