4-Square Feet. (18 x 32 Inches) of butyl sound dampening material - Increases bass output and enhances speaker quality - Eliminates speaker distortion road noise and rattle - Can also be used for doors trunks trunk lids interior panels floorboards etc - Three-step easy installation - Chemical resistant to water and mineral oil - Adhesive peel strength: minimum 43 lbs/in on cold steel - Temperature range: 14-140 degrees Fahrenheit - Thickness: 2.1mm (0.083-Inch) - Dimensions: 18 x 32 Inches