Arlington FLB3520 Series round cut-in floor box kits come with either a brass cover or nickel plated cover. Each having two threaded plugs, for installed floors, 1-gang, cover,1-pack. 1-Gang round floor box kit. For existing wood and concrete floors. Ready to install - installation hardware included. For a neat, convenient way to put a receptacle (outlet) in the floor . Metallic Brass metal cover and threaded plugs. Arlington's round, cut-in floor box kits offer installers the low cost, convenient way to install a Duplex receptacle flush with the floor. The 4-Inch round, UL listed in an existing wood or concrete floor. Electrical Conduit must be accessible from underneath the floor if installing in existing concrete. Complete the job with the 4-inch round metal cover available in brass or nickel-plated brass colors. Floor box kit includes Non-Metallic box, round metal cover, Non-Metallic gasket support plate, gasket, UL listed 15-Amp tamper resistant Duplex receptacle, NM94 and nm cable connectors, (3) #8 x 1/2-inch flat head screws and (1) #6 x 1/2-inch screws. Arlington is a leading manufacturer of quality electrical products, communications products, home theater products, and more since 1949. To meet the changing needs of the electrical industry, Arlington continuously develops unique and innovative products that meet the quality standards our customers expect.