The BPF-SS-1200-20-2000-18000-21000-20-SF-SF / 800179 from DETI Microwave is a Band Pass Filter with Frequency 2 to 18 GHz, Insertion Loss 1 dB, Upper Rejection 3 to 20 dB @19500 to 21000 MHz, Lower Rejection 3 to 20 dB @1200 to 1800 MHz, Power 2 W. Tags: Module with Connectors, Suspended Substrate Filter. More details for BPF-SS-1200-20-2000-18000-21000-20-SF-SF / 800179 can be seen below.