HiFi Works 30005 HFW6R 6.5-Inch In-Ceiling Speakers, White (Pair) Perfect in-ceiling speakers for a medium-sized room 6.5-inch black polypropylene subwoofer 0.75-inch cloth dome tweeter with a Ferrofluid cooled voice coil Easy installation with the patented Roto-lock system Measures 9.75 x 3.75 inches (Diagonal x Depth)