The QBF-1400-1850-60 from Qualwave is a Band Pass Filter with Frequency 1.4 to 1.85 GHz, Bandwidth 450 MHz, Center Frequency 1625 MHz, Insertion Loss 2 dB, Upper Rejection 60 [email protected] to 3 GHz. Tags: Module with Connectors. More details for QBF-1400-1850-60 can be seen below.