Add 18" of pneumatic height adjustment to any board with the Elevation"! Wall Mount. Holds up to a 4"H x 8"W board between 50 and 100 lbs and up to 5" thick. Ultra Short Throw projector arm hold up to a 25 lb. projector. Platinum powder-coat finish is attractive and durable.BLT27622. 27622. Balt Balt Elevation Wallmount w/ Ultra Short Arm.