Size The goof rings for recessed lights come in 4 packs, and fit 3.5-4" Inch recessed ceiling light fixtures, which measure 5.51 x 3.97 x 0.04inches/14 x 10.1 x 0.1cm(Outer DiameterInner DiameterThickness), Color: Matte Finish White; Material: Steel. Goof Rings For Recessed Lights This trim ring thickness is only 0.04 inches, its overlay sits flush against the ceiling in between the drywall and the recessed light. Also works with ceiling fans and pendant lights. Steel material, durable to use. Good Quality Material The recessed light trim cover is made of carbon steel material which has high strength and rigidity, can withstand greater pressure and load, and its surface hardness can effectively resist friction and wear for a long lifespan. The goof rings for recessed lights are Designed to cover any wall mounting hole imperfections such as torn drywall, damaged areas, mis-cuts, or oversized holes, these trim rings hide flaws and give your ceiling a clean and tidy finish. Easy To Install Place the Baffle into the trim ring, the trim ring is held in place by the baffle. Once Baffle is inside of trim ring then position the baffle into the recessed lighting housing and put it into place with springs. Application This Trim Ring is a lamp hole replenishment ring, which is mainly used to hide the mounting hole gaps of downlights and spotlights. Using it is equivalent to adding spacers to the LED light. Achieve a seamless ceiling appearance with our white metal trim rings.