Quartet - QRTM3423 Mix, match and connect multiple Matrix boards to create your own unique individual system. Thin profile, dry-erase board surface is magnetic, doubling its use as a bulletin board. Flexible mounting secures the board to the wall in two orientations, allowing for horizontal or vertical hanging. Each magnetic board includes a flexible mounting system, marker tray, Quartet dry-erase marker and magnets. Mount the board to cubicle walls with Quartet Cubicle Partition Hangers (sold separately).