Two Rolls 18" x 33.5 ft of Self-Adhesive Butyl MegaMat (100 sq ft total) w/Install Instructions, Wood Roller, Knife, and FatMat Decal * Patented Butyl Rubber Compound with Protective Reinforced Aluminum Face * Anti-Vibration Membrane Absorbs and Dissipates Vibrations * Sound Deadening Acoustical Insulation for Cars, Trucks, RV"s, Marine, & Home. Very Pliable * Reduce Sound Distortion, Gain Sound Quality