80/20 media replacement, used in Airflow Systems units wherever 7FR0-2020 is specified: it is not a media replacement for 7FRO-2020 but it is the same dimension. Used in PCH-1, PCH-2; DCH, DCH-2; DC-4, DC-6, DC-8, DC-12; DTH-1700, DTH-800; DT3000.