Twelve feet of adjustable book shelves with integrated storage cabinets below made of 3/4" birch plywood and 2" poplar face frames all assembled with Kreg pocket hole Joinery construction. Doors are made with poplar face frame and 1/4" birch plywood. Over all size of 12' - 0" wide x 73" height x 12" depth. The assembly was built in four identical modules joined with furniture bolts and attached to wall studs every 16". A 1-1/2" crown molding at the top and 3-1/4" base molding was added across the full width.