High Temperature Insulation, Material Calcium Silicate, Color White, Approx. R Value 0.77, Thickness 3/4 in, Density 40, Temp. Range 0 Degrees F to 1700 Degrees F, Length 12 in, Width 12 in, Strength Extra Strong, Moisture Absorption Minimal, Standards ASTM C656, C795, E119, E136, E72, E84, NFPA251, UL1479, UL1709, UL263 Package of 6.
eBay