HiFi Works 30004 HFW5R 5.25-Inch In-Ceiling Speakers, White (Pair) Perfect in-ceiling speakers for a small- to medium-sized room 5.25-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 7.9 x 2.6 inches (Diagonal x Depth)