Displays2go Enclosed Cork Board, Sliding Glass Door, 4' x 3', Locking Bulletin Board for Wall (CBSD43BK) Enclosed bulletin board has 45-inch x 33-inch self-healing natural cork surface Locking message board has glass door keeps notices protected from tampering Notice board slides open for easy change out of newsletters and messages 4' x 3' aluminum frame with black finish accentuates any lobby, hallway, office, or school Holds up to 15 sheets of 8.5x11-Inch paper