This unassembled 9-5/8" deep hive body is finger jointed and is Select grade. The wood is Radiata pine, which is significantly stronger than the pines most manufacturers use, Ponderosa and Eastern White Pine. These boxes are cut here in the Pacific Northwest, and we assemble them at our own local wood shop. Like all pines, it is important to paint the box with an exterior latex or treat it with on oil annually. Tung oil is a good choice.