1ST Poly Premium Cloth Zipper Tape 2.75? x 7? Double Sided Zipper Pull - 60/Case 1ST Poly Premium Cloth Zipper Tape 2.75? x 7? Double Sided Zipper Pull - 60/Case 1st Poly Blue Cloth Zipper Tape adhesive zippers can create any size doorway with poly sheeting or canvas to control dust, reduce heat loss or create an instant entrance / exit to any closed area. For interior or exterior use. 1st Poly Zippers are perfect for all types of construction. This zipper is ideal when your barrier will be up for a while, if there will be a lot of traffic in and out, or if the worksite will go below freezing. Meets federal containment specs for asbestos removal.The new, thicker adhesive generates superior sticking abilityExpect a big performance from this compact 2.75 in. x 7ft. zipperOne release strip for faster assemblyHeavy-duty teeth and easy grip 2-sided pull for effortless sliding (description exceeds maximum possible length)