Made from lightly resin Bonded rock fibers with wire mesh machine stitched and Machine lay on one side used in boiler, equipment vessel tank, chimney, ESP, pipe & fitting. Duct & other industrial applications: Operating Temp: Up to 700 C Sizes : Mattresses in the size of 1.22 mX1.52 m with wire mesh machine Density : 100, 120, & 150 Kg/m3 Thickness: 25, 40, 50, 65, 75 & 100 mm