.Ceiling volume 18 cubic inch diameter 3 inch depth 2-3/4 inch blue color polycarbonate material mounting means captive nails with ground screw attached.
5 cubic inch diameter 3-1/2 inch blue color PVC material mounting means base ears and snap-in bracket.Super Blue BH614RP Round Old/New Work Ceiling Box with Ground Lug and Screw volume 14.