Crafted out of double-wall nylon strap material that is double-stitched for added durability. This Barrier Strap features a universal design that measures 45in.L x 3-1/2in.W, which allows it to be used on almost any style doorway. Strap incorporates magnets on each side (inside the double-stitched nylon pull tab) for quick application to metal door frames, hinges or door strikes. The unit can be used for indoor or outdoor applications, and simply rolls up for easy and compact storage anywhere. This strap reads, "DO NOT ENTER CLOSED FOR CLEANING" on a vibrant yellow backing, to offer higher visibility.