Packing Including: 40CM x 25CM Sound Deadener Mat Item Specifications: Length: 40cm/Sheet Wideth: 25cm/Sheet Thickness:0.197"=197mil=5mm Size For Reference Square Meter/Sqm Square Foot/Sqft 1 10.76 2 21.52 3 32.28 4 43.04 5 53.8 Item Description: Material: Fiberglass + Rubber Foam Color: Silver+Black Recommended Install Temperature: -10°C ~ +60°C Resistance Temperature Range: -40°C ~ +300°C Waterproof & Fire Resistant: Yes Item Features: 100% Brand New. Compared with rolled cotton, it is more flexible to use. .