The Dynamat Xtreme Sound Deadening Car Insulation Speaker Pack 10415 is a pre-cut noise insulation material designed for car audio and video installations. Made of rubber and measuring 10" in length and width, this black material effectively deadens sound to provide a quieter and more enjoyable driving experience. Manufactured by Dynamat, a trusted brand in the industry, this speaker pack is an essential accessory for those looking to improve their vehicle's audio quality and reduce unwanted noise.