Steel Boxes 4-OCT-1-1/2D-BOX-EXT-1/2KO

STEEL MATERIAL; 1-1/2 INCH; OCTAGON SHAPE; UL, CSA APPROVAL; 4 INCH DIAMETER; 15.5 CU. INCH CAPACITY; (4) 1/2 INCH CONDUIT SIDES KNOCKOUT SIZE; 4 KNOCKOUT(S); APPLICATION CEILING OR WALL LIGHTING FIXTURES, EXTENSION RINGS PROVIDE A MEANS FOR ADDING ADDITI