Dimensions: The bed support measures 55mm wide x 9mm high (inside) and fits slatted bases from 52mm to 54mm wide and 8mm to 9mm thick. It is recommended to check the size of the bed before purchasing. Practical Replacement: The bed base slat covers are perfect for replacing damaged or missing slat supports on metal beds, leather beds, wooden beds, sofa beds, bunk beds, etc. HIGH-QUALITY MATERIAL: The slatted base cover is made of high-quality plastic, sturdy and durable, wear-resistant, black, suitable for all types of slatted bases. EASY TO INSTALL: Used in the holes of the bed frame side rails, fits all bed frame rails. Packing List: Contains 40 bed support brackets (for bedside), sufficient quantity.