American Lumber says its White Oak Super Prime provides manufacturers consistency in color appearance while offering premium lumber quality and durability. The custom grade lumber is almost virtually free of sap and knots and can be used to increase yield and reduce waste, the company adds. Used by wood products manufacturers, moulding and millwork companies, or for paneling, White Oak Super Prime is offered in 4/4 through 8/4 thicknesses and in lengths ranging from 6 to 16 feet.