The CB1887/35SK-B2 from G-WAY Microwave is a Band Pass Filter with Frequency 1870 to 1905 MHz, Bandwidth 35 MHz, Center Frequency 1887.5 MHz, Insertion Loss 0.9 dB, Rejection 10 to 12 dB. Tags: Module with Connectors, Cavity Filter. More details for CB1887/35SK-B2 can be seen below.