... air filter 1.Bag(pocket)filter,Panel frame,Box Filter, edia/felt 2.Efficiency spec:G1~G4, F5~F9, H10~H13 heat ... resistant air filterShanghai SunMax Air Filter Materials Co., LtdEstablished in 1995.Daily output is ... Orion Registrar ,Inc. ,USA Certificate of RegistrationProduct Range: Production of Air Filter and Filter Material. heat resistant air filter