UniTherm Ceramic Fiber Insulation Blanket Roll, (8# Density, 2300&deg;F)(1"x24"x25') for Kilns, Ovens, Furnaces, Forges, Stoves and More! Price For: Each Standards: UL 723 Continuous Use Temp.: 1922 Degrees F Thickness: 1" Density: 8 cu. ft./lb. Approx. R Value: .75 Width: 24" Max. Temp.: 2300 Degrees F Material: Aluminum Silicate Fiber Length: 25 ft. Item: Ceramic Fiber Insulation Country of Origin (subject to change): China