724 Features: -Octagon blank box cover with knockout. -Material: Steel. -Used to close an outlet box. -Switches or receptacles may be installed into octagon boxes by using covers. -Raised covers are used for mounting lighting fixtures. -Swivel cover restricted to 20? swing from vertical. -Kwik-hang allows easy installation of high bay lighting fixtures. -Fixture nests in cover while wiring is completed. -UL - File E195978. -CSA - File LR-1082 (722, 729, 731). -Dimensions: 4" H x 4" W x 0.06" D.