Quartet Enclosed Cork Bulletin Board, 30" x 39" or 9 Sheets, Swing Door, Aluminum Frame (EIHC3930) Internal, enclosed board features a durable and classic cork surface ideal for posting printed materials; documents can be quickly hung with just a few push pins or thumbtacks Suitable for communicating key information in an indoor environment, this enclosed board is great for schools, office and commercial/retail spaces; safety glass front is crystal clear, durable and protects your display from damage 30" x 39" board with aluminum frame holds 27" x 37" signage or 9 sheets of letter size paper for versatile display needs Hinged, swing door with 100 Degree opening allows quick & easy access for sign changes; Single, glass door has a barrel lock and 2 identical keys are included for security and peace of mind; Enclosed board includes invisible brackets for easy wall mounting