Good quality and high performance high temperature resistant super fine glass fiber filter paper is used as filter medium and aluminum foil corrugated sheet is used as spacer while frame is made of SUS304 stainless steel plate and it is sealed and assembled by high temperature resistant sealant,so the air filter has high filtering efficiency,low resistance and good performance of high temperature resistance and it is mainly used in equipment and system like super clean oven which requires high temperature air purification. Extreme dimension: width≤1220mm,length≥1220mm,thickness is 50~300mm.