ZipWall HDAZ2 2Pk HD Adhesive Zippers 3 x 84 Includes Knife

The ZipWall Heavy-Duty Zipper works as well for permanent access through plastic barriers as it does for temporary access. Each box of two zippers come with the exclusive ZipWall Zipper Knife. It cuts a swath of plastic away from the zipper teeth preventing jams. Works in temperatures below freezing. This adhesive zipper features 2-sided pulls, a very smooth glide action and easy press-on application.