The QBF-5600-6000-60 from Qualwave is a Band Pass Filter with Frequency 5.6 to 6 GHz, Bandwidth 400 MHz, Center Frequency 5800 MHz, Insertion Loss 0.9 dB, Upper Rejection 60 [email protected] GHz. Tags: Module with Connectors. More details for QBF-5600-6000-60 can be seen below.