VERSATILE, 2-LAYER, .25" THICK, NOISE-CONTROL MATERIAL IDEAL FOR FLOOR PANS,TRANSMISSION TUNNELS, LUGGAGE AREAS, TRUNKS, FLOORS & MORESPECIALLY CONSTRUCTED BARRIER MATERIAL THAT USES A 2-LAYER TECHNIQUETO BLOCK THE PASS-THROUGH OF MOSTUNWANTED NOISE 4 SHEETS AT 24" X 27"