Crafted out of double-wall nylon strap material that is double-stitched for added toughness. 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 is UV resistant for indoor/outdoor use and simply rolls up for quick and compact storage anywhere. This strap reads, "DO NOT ENTER CLOSED FOR MAINTENANCE (Bi-Lingual)" on a vibrant yellow backing, to offer high visibility.