The CB1835/30SK-B2 from G-WAY Microwave is a Band Pass Filter with Frequency 1820 to 1850 MHz, Bandwidth 30 MHz, Center Frequency 1835 MHz, Insertion Loss 0.8 dB, Rejection 75 to 80 dB. Tags: Module with Connectors, Cavity Filter. More details for CB1835/30SK-B2 can be seen below.