The QBF-39700-40300-60 from Qualwave is a Band Pass Filter with Frequency 39.7 to 40.3 GHz, Bandwidth 600 MHz, Center Frequency 40000 MHz, Insertion Loss 1.5 dB, Upper Rejection 60 dB @42.3 to 50 GHz. Tags: Module with Connectors. More details for QBF-39700-40300-60 can be seen below.