Lenzip Zipper #10 - The Only Lifetime Boat Zipper Compatible with YKK #10 Boat Zippers - Double Metal Locking Slider - Two Stainless Steel Zipper Stops Included The only LIFETIME boat zipper compatible with YKK #10 boat zippers UV stable DuPont Delrin marine zipper that provides quality performance Perfect for use on marine canvas, enclosures, coverings, and recreational equipment Strong and long lasting outdoor zipper Made in the USA