4" Inch Recessed Ceiling Can Light Trim Ring Reflector Chrome USABLE TO EXCHANGE THE RING OF 4 INCH LIGHT BAFFLE TRIMS LIKE SHOWER TRIMS, BAFFLE TRIMS, ... THAT RING CAN BE SEPARATE FROM REST OF TRIM. INNER DIAMETR OF RING: 3-1/2 INCH - OUTER DIAMETER OF RING: 5 INCH CHROME REFLECTOR FINISH