Rectangular series floor boxes are ideally suited for heavy floor traffic applications, such as malls, department stores, banks and schools. Floor boxes are installed in poured concrete floors and are fed with conduit. Floor boxes are used in branch circuit wiring. Cast iron, water tight body, fully adjustable floor box. Cast iron construction with gray powder coat finish for corrosion resistance. 3/4 inch knockouts. All bottom knockouts are accessible. 2 low voltage dividers are included.