The QBF-10000-12000-40 from Qualwave is a Band Pass Filter with Frequency 10 to 12 GHz, Bandwidth 2000 MHz, Center Frequency 11000 MHz, Insertion Loss 1.5 dB, Upper Rejection 40 dB @12.5 GHz. Tags: Module with Connectors. More details for QBF-10000-12000-40 can be seen below.