Add 20" of electric height adjustment to any board with the iTeach"! Wall Mount. Attach the mount wherever needed on your wall to allow easy accessibility. Holds a board to 5" thick. Platinum powder-coat finish is attractive and durable. Mount includes a Short Throw Projector Arm.BLT27631. 27631. Balt Balt iTeach Electric Wallmount w/ Short Arm.