The QBF-26000-28000-40 from Qualwave is a Band Pass Filter with Frequency 26 to 28 GHz, Bandwidth 2000 MHz, Center Frequency 27000 MHz, Insertion Loss 2 dB, Upper Rejection 40 to 60 dB. Tags: Module with Connectors. More details for QBF-26000-28000-40 can be seen below.