Baffle trim for 4" inside diameter housings. Easy-to-install with mounting hardware, instructions included. IC (insulation contact) and NON-IC rated. Uses (1) R 20 or Par 20 50W (watt) maximum bulb. 7.5" H X6.75" D. Can also be used with R 20 and Par 20 LED (light emitting diode) and CFL (compact fluorescent) bulbs. UL (Underwriter's Laboratories) listed.