The QBF-25500-29500-30 from Qualwave is a Band Pass Filter with Frequency 25.5 to 29.5 GHz, Bandwidth 4000 MHz, Center Frequency 27500 MHz, Insertion Loss 1.5 dB, Upper Rejection 60 dB. Tags: Module with Connectors. More details for QBF-25500-29500-30 can be seen below.