Cover has two 1/2 trade size conduits and one 3/4 trade size threaded conduit opening for feeding cables and wires through the floor. Flush flanges available in a variety of colors/finishes. Slide covers match painted flange colors. Aluminum and brass covers shipped with black slide covers. Brass flange also available with nonmetallic brass-color slide holder. Die-cast aluminum construction with three 1/2 trade size knockouts: two on the sides and one on the bottom. 18 cu. in. (295 cu.cm) capacity. Requires a 4 (102mm) diameter hole. Anodized Aluminum