Southwire 1/2 In. x 4 In. Open Round Steel Raised Cover is a round fixture ring designed to mount light fixtures in walls and ceilings. This ring converts a 4-inch square box into a round opening featuring 8-32 threaded mounting tabs, making it i for lighting retrofit applications. The angled slots on the cover allow for up to 1/2 inch of box misalignment on upright framing members, ensuring a precise fit. Additionally, these rings meet UL and RoHS compliance standards, providing safety and environmental assurance. Model Number: 54C3-UPC