Plastic Lumber Outdoor Message Centers are built to last, The Plastic Lumber material is weatherproof, durable and available in five attractive colors, It is also environmentally friendly in that it is made from recycled material, They can be easily mounted to walls or you can choose the optional matching posts for free standing applications, All Letter Board models come complete with 1 Free set of 3/4"" Helvetica Letters and assortment tray, Sliding door models offer a fully viewable display surface, Choose from changeable letter panels or vinyl covered cork tackboard surface (custom colors available), The two sliding doors open and close smoothly thanks to the precision rollers, Keep your contents secure with the specially designed sliding door lock which includes two keys, Length: 5, 5, Height: 40, Width: 52 SKU: AARC4771