Balt Essentials Mobile Vertical Sliding Whiteboard, Vertical Boards, Box 1 of 2 and must order box 2 to complete unit (84186) Patented double sided vertical sliding whiteboard gives you 4 times the writing surface area. Boards can pass by each other to get full use of space down to the floor. Each magnetic whiteboard surface is 47.2"W x 35.4"H; total unit height 76.3" The top dry erase board remains in the fixed position and the other easily slides up and down as needed. Perfect for use as a standing height easel whiteboard or full height room divider. This is box 2 and you must order box 1 to complete the unit.