The QBF-350-550-60 from Qualwave is a Band Pass Filter with Frequency 350 to 550 MHz, Bandwidth 200 MHz, Center Frequency 450 MHz, Insertion Loss 2 dB, Lower Rejection 60 dBc@136 to 174 MHz. Tags: Module with Connectors. More details for QBF-350-550-60 can be seen below.