Displays2go Outdoor Bulletin Board, Magnetic Surface, 24 x 31 Inches, Wall Mount (ODM851431HS) Outdoor enclosed bulletin board has a swinging door with waterproof rubber gasket seal Backing of bulletin board is made of metal and newsletters and announcements are held in place by magnets Top header area provides space for a sign or logo Made from aluminum with a polycarbonate lens. Measures 24" x 31" Displays2go SKU#: ODM851431HS