Durable self-adhesive zippers attach to plastic sheeting and create an entry in seconds. Two zippers can create a hands-free door. The 7 Ft. long 3 In. wide heavy-duty zipper withstands high traffic. Specially designed ZipperKnife double-cuts the plastic to prevent jams. Flap hooks hold the entryway open for easy access. Contains: 2 heavy-duty zippers, 2 flap hooks, and ZipperKnife sheeting cutter.