Five 18" x 40" sheets Self-Adhesive RattleTrap (25 sq ft total) w/Install Instructions, Wood Roller, Knife, and FatMat Decal * 80 mil nominal thickness with Patented "Super-Stick" Adhesive * Sound Deadening Acoustical Insulation for automotive, trucks, homes, RV"s, and marine * Hear more of the sound you want! Vibrational damper: reduces distortion, boosts bass. Uses range from personal enjoyment to extreme competitions such as dB Drag Racing. * Pliable, easy to cut, heat-resistant aluminum coating. Keep Sound In, Noise Out - A Sound Decision!