7" Zipper YKK #3 Skirt & Dress ~ 580 Black (12 Zippers / Pack) ZipperStop Wholesale Authorized Distributor YKK Zipper- Made in USA 7 Inch YKK #3 Skirt & Dress Made in USA Color 580 Black (12 Zippers / Pack)... Strong yet lightweight zipper for slacks, skirts and dresses. These are nylon zippers with plastic teeth and a metal slider. They are ykk brand and are closed ended (non separating).