Ceramic Fiber Blanket, High-Purity Grade, 8 pound density, 1 inch thick, SIZE is 24 inch x 25 Foot Roll (1 ea. included). Ceramic Fiber Blankets supplied by Sterling Seal & Supply are manufactured from spun TaoFibre Ceramic fiber and is needled to provide exceptional handling strength for high temperature insulation applications. All grades are lightweight and thermally efficient resulting in a material that has the advantage of low heat storage and complete resistance to thermal shock.