Enhance the sound quality in your vehicle with this Ballistic Hollow Point Series SDHP-TK trunk kit, which contains 10 pieces of 2mm-thick 12′′ x 24′′ butyl-rubber-composite material with an aluminum constraining layer to dampen vibrations. Compatible with most vehicles For use in your existing vehicle. 10 pieces of 2mm-thick 12′′ x 24′′ butyl-rubber-composite material With an aluminum constraining layer to provide vibration damping and enhance sound quality. Covers up to 20 sq. ft. To accommodate your space.