The QBF-18000-25000-80 from Qualwave is a Band Pass Filter with Frequency 18 to 25 GHz, Bandwidth 7000 MHz, Center Frequency 21500 MHz, Insertion Loss 1.5 dB, Upper Rejection 80 dB @29 to 35 GHz. Tags: Module with Connectors. More details for QBF-18000-25000-80 can be seen below.