Dynamat 10465 24" x 48" x 0.067" Thick Self-Adhesive Sound Deadener with Xtreme Mega Pack, (Set of 9) Application: Use on rear decks, doors, floors and the floor of your trunk to get more bass, more music, lower road noise and better sound Dynamat Xtreme quiets annoying road noise, improves a speakers dynamic range, and makes for a more comfortable driving experience. Contents: (9) 24x 48 (609mm x 1219mm) sheets of Dynamat Xtreme.