The QBF-38250-38750-30 from Qualwave is a Band Pass Filter with Frequency 38.25 to 38.75 GHz, Bandwidth 500 MHz, Center Frequency 38500 MHz, Insertion Loss 3.49 dB, Upper Rejection 30 dB @39.05 GHz. Tags: Module with Connectors. More details for QBF-38250-38750-30 can be seen below.