OptiMA® space dividers and room partitions are constructed with magnetic dry erase whiteboards and vinyl tack surfaces to create the ultimate mobile office dividers. Portable or mobile room partitions with both magnetic dry erase marker boards and vinyl covered bulletin boards that offer great efficiencies for open office environments as office partitions or office dividers and in classrooms as room partitions and space dividers. These attractive magnetic receptive, dry erase, dual-purpose office partitions and office dividers provide a unit that is easily portable yet very stable and effective in function and appearance. Wide, heavy-duty aluminum bases provide maximum stability. The mobile office partitions and space dividers have locking casters allow for ease of movement when you want it, or securely lock the wheels to keep your unit in place. There is a standard 2"" map rail for posting memorandums and other correspondence requiring quick reference on any unit with a dry erase board. The map railing is mounted on the same side as the dry erase board. Each unit that has a dry erase board is also equipped with a full-length aluminum tray to hold markers and erasers. On the vinyl tackboards the top and bottom sections are broken up with a vinyl covered H-Bar. Marker trays do not come on the vinyl covered units. The vinyl bottom section is 24"" on all units - The 64"" tall portable board units have a 36"" whiteboard and the 76"" tall portable room divider units have a 48"" whiteboard. The casters will add 4"" to the overall height.