The CB1748/75SK-B5 from G-WAY Microwave is a Band Pass Filter with Frequency 1710 to 1785 MHz, Bandwidth 75 MHz, Center Frequency 1747.5 MHz, Insertion Loss 1.1 dB, Rejection 50 to 75 dB. Tags: Module with Connectors, Cavity Filter. More details for CB1748/75SK-B5 can be seen below.