Three-Pack YKK 21" x 1" #5 Brass Two-Way Separator Zippers - Black - Use for sail covers, canvas enclosures, jib luff sleeves, jackets, and much more! 21"x1" Brass Metal Two-Way Separator Zippers - Black - Pack of 3 Auto-locking sliders Heavy-weight with polyester tape & gold teeth Great for any sewing project