The CB2500/600SK-B1 from G-WAY Microwave is a Band Pass Filter with Frequency 2200 to 2800 MHz, Bandwidth 600 MHz, Center Frequency 2500 MHz, Insertion Loss 0.8 to 1 dB, Rejection 10 to 85 dB. Tags: Module with Connectors, Cavity Filter. More details for CB2500/600SK-B1 can be seen below.