The QBF-43500-45500-50 from Qualwave is a Band Pass Filter with Frequency 43.5 to 45.5 GHz, Bandwidth 2000 MHz, Center Frequency 44500 MHz, Insertion Loss 3 dB, Upper Rejection 50 dB @46.2 GHz. Tags: Module with Connectors. More details for QBF-43500-45500-50 can be seen below.