The QBF-8400-8500-90 from Qualwave is a Band Pass Filter with Frequency 8.4 to 8.5 GHz, Bandwidth 100 MHz, Center Frequency 8450 MHz, Insertion Loss 1.9 dB, Upper Rejection 90 dB @8.8 to 22 GHz. Tags: Module with Connectors. More details for QBF-8400-8500-90 can be seen below.