The QBF-430-450-30 from Qualwave is a Band Pass Filter with Frequency 430 to 450 MHz, Bandwidth 20 MHz, Center Frequency 440 MHz, Insertion Loss 1 dB, Upper Rejection 30 [email protected] to 1 GHz. Tags: Module with Connectors. More details for QBF-430-450-30 can be seen below.