The graphite insulation material is based on pitch and PAN based materials, which is light in weight, high in strength, wear resistance, high temperature resistance, high purity, excellent thermal insulation performance. The material is specialized applied in refractory field, with good thermal insulation performance, easy to cut, good quality and competitive price, as far as now, the material is widely used and well recognized by customers around the world. The thickness of the rigid felt include 20mm, 30mm, 40mm, 50mm and 60mm etc. it can be covered by graphite foil, cloth, C/C, SiC etc. The material is recommended to be used in: crystal furnace, carbonization furnace, quartz furnace, vacuum furnace, induction furnace, high frequency furnace and heat balance reactor, heat treatment furnace, sintered furnace, welding furnace, high pressure furnace etc.