Ceramic Fiber Insulation, Insulation Material Aluminum Silicate, Overall Length 25 ft, Overall Width 4 ft, Thickness 1 in, Maximum Use Temperature 2,300 Degrees F, Density 8 lb/cu ft, R Value @ 1000F 0.75, Form Roll, Flexibility Flexible, Standards UL 723, Insulation Width 4 ft, Pipe Insulation Item Ceramic Fiber Insulation, Maximum Continuous Use Temperature 1,922 Degrees F, For Piping System Industrial Process, For Use On Pipe Insulation, Insulation Color White