This a-frame blackboard wet-erase menu board is great for retail establishments such as restaurants, stores, banks, gas stations, car washes. To communicate with customers-to-be. Advertise boards can be used indoors and outdoors. Metal frame construction, blackboard is MDF with black melamine finish. Best use chalk markers wet-erase with a damp cloth or rubbing alcohol. The double-sided black sandwich board offers 2 write-on board areas. Thus allow you or your artist to draw and write two messages to better attract and direct your patrons. Great signage exposure, hard to miss. * the write-on sidewalk sign has a hinged design, which allows users to fold the unit flat at the end of the day. The side hinge helps keep two boards linked at the proper angle. Buy this sidewalk sign to create personalized advertisements and announcements that are sure to capture the attention of passersby. * easy carry handle on top. Lightweight, at 17 pounds this is easy to bring in and out of your shop. Overall dimensions: 39" x 23.6". Writing area: 23" x 33". The double-sided sidewalk sign.