Eight 1/2" and four tko conduit knockouts (sides). two 1/2" and two tko conduit knockouts (bottom). 30.3 cubic inch capacity. ul listed, file e195978, u.l. 514-a, suitable for use without a bonding jumper in circuits above or below 250 volts. combinationcover screw heads provide for faster mudring/cover installation. no bracket, installed in ceilings or walls for lighting fixtures or receptacles. upc bar code.