Floor Box Furnished with 524-NS (Nickel Silver) Cover for Com. / Data.  Flush mount.  Heavy cast iron box.  Dimensions are 4" top and 3-1/8" bottoms with 6 conduit openings.  Two 3/4" and two 1/2" openings on the sides.  Two 1/2" openings on the bottom.  A single receptacle will also fit this box.
For wood or concrete.