3M™ Cork Boards feature graphite blend cork and stylish widescreen aluminum frames for a professional appearance. Self healing cork. Includes mounting brackets plus Command™ picture hanging strips to stabilize bottom. All 4 ft x 3 ft and smaller boards can be hung without hardware on appropriate surfaces. Interlocking Fasteners System. Board Type: Bulletin; Board Width: 72 ; Board Height: 48 ; Board Depth: 1 .