The QBF-6000-18000-50 from Qualwave is a Band Pass Filter with Frequency 6 to 18 GHz, Bandwidth 12000 MHz, Center Frequency 12000 MHz, Insertion Loss 2 dB, Upper Rejection 50 to 60 dB. Tags: Module with Connectors. More details for QBF-6000-18000-50 can be seen below.