Fire resistant due to its high melting temperature of 11770C (21500F), Excellent sound absorbency, Water and moisture resistant; does not absorb moisture to maintain insulating value, Easily cut, Does not rot or promote growth of fungi or mildew, Covers:37.5ft2 (3.48 m2), Thickness: 5 1/2 140 mm), Width: 23 (584 mm), Length: 47 (1194 mm), 5 pieces per package