The CB1900/8.75SK-B4 from G-WAY Microwave is a Band Pass Filter with Frequency 1895.625 to 1904.375 MHz, Bandwidth 8.75 MHz, Center Frequency 1900 MHz, Insertion Loss 1.2 dB, Rejection 20 to 57 dB. Tags: Module with Connectors, Cavity Filter. More details for CB1900/8.75SK-B4 can be seen below.