SHELF LOCK: 3 Medicine Cabinet Shelf Guard Attachments (Medicine Cabinet NOT INCLUDED) Stop the Drop with SHELF LOCK! Keep everything on the shelves and off of the floor! Attaches to shelves with double sided tape (supplied) to create a barrier so that things stay on the shelves and off the floor. Made for standard 13" wide medicine cabinets like the one shown. Includes 3 Shelf Lock attachments: 13" wide x 2.5" high, 13" wide x1.5" high, 12" wide x 1.5" high. Made of PVC Plastic