The QBF-26300-26900-40 from Qualwave is a Band Pass Filter with Frequency 26.3 to 26.9 GHz, Bandwidth 600 MHz, Center Frequency 26600 MHz, Insertion Loss 0.6 dB, Upper Rejection 40 dB @=30 GHz. Tags: Module with Connectors. More details for QBF-26300-26900-40 can be seen below.