HiFi Works 30001 HFW5 5.25-Inch In-Wall Speakers, White (Pair) Perfect in-wall 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 Flex-bar system Measures 7.5 x 11 x 2.3 inches (W x D x H)