The QBF-1000-1800-30 from Qualwave is a Band Pass Filter with Frequency 1 to 1.8 GHz, Bandwidth 800 MHz, Center Frequency 1400 MHz, Insertion Loss 2 dB, Upper Rejection 30 to 60 dB. Tags: Module with Connectors. More details for QBF-1000-1800-30 can be seen below.