WIREMOLD V5735 Distribution Box, 500/700Series, IV, Steel. More details: Distribution Box, Raceway Type 500/700 Series, Number of Channels 1, Height 4 3/4 In., Width 4 3/4 In., Length 1 3/8 In., Color Ivory, Material of Construction Steel, Mounting Screw, Standards UL CSA, For Use With Devices With Mounting Screw Centers of 2 3/4 In, 3 1/2 In, and 4 1/16 In, and Canopy Fixtures 4 5/8 In Diameter or Smaller., Includes 1/2 In and 1 In Concentric Trade Size Knockouts