Product Details: Nine 18" x 32" Pieces of Sound Deadening Material 90.55mil thick (2.3mm)! There are cheaper, inferior solutions at 50-80mil, but we do not recommend that thin of a solution as it will not perform as well. 36 Square feet total Complete sound damping kit for entire vehicle/car. Can be used for areas such as the trunk, doors, roof, and floor Made from 100% Butyl Rubber Eliminates road noise Quiets vibrations Increases sound quality and output of car audio system Stops rattles Increases SPL Reduces heat Easy-to-form aluminum conforms to the desired area of the vehicle with ease Four-step peel and stick design for easy installation Up to 30% thicker than the leading competitors 1-year Warranty from the Original Purchase Date Dimensions (each piece): 18"L x 32"W