Packing Including: 24 Sheets 50cmX38cm Butyl Sound deadening 2 Pcs Application Tools Description: Brand: Modigt Condition: 100% New Material: Aluminum Butyl Size: 50cmX38cm/Sheets Thickness: 60mil (1.5mm) Total Area: 4.56SQM=49.08SQFT Function: Car Sound Insulation Features: Car Heat / Sound Insulation Reinforced / Crush Resistant: Yes Mildew & Mold Resistant: Yes Water resistant: Yes Non-toxic: Yes Advantages of butyl rubber.