The QBF-8000-12000-30 from Qualwave is a Band Pass Filter with Frequency 8 to 12 GHz, Bandwidth 4000 MHz, Center Frequency 10000 MHz, Insertion Loss 1 dB, Upper Rejection 30 dB@13 to 20 GHz. Tags: Module with Connectors. More details for QBF-8000-12000-30 can be seen below.