Overview Reviews Product Description General Features: One (1) 3.3" x 10" Sheets Butyl rubber material SAE J1637 tested 40% more damping than standard non-embossed aluminum mat Deaden noise and vibration by up to 10dB over competition Black foil backing 1.5 mm thick Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Rockford Fosgate Rockford Fosgate Sound Dampening License Plate Kit - RFDS-PLATE Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments