Fittings for 500 and 700 one-piece surface metal raceway Designed for standard shallow switches and receptacles including single gang combination devices Base has 1/2 and 1 concentric trade size knockouts and a 1-13/16 x 1-7/8 rectangular knockout to permit mounting on a one gang in-wall outlet box Two gang Box bases have a #8-32 tapped hole for use with a ground screw Ivory 4-3/4 width 1-3/8 depth 4-3/4 length