The CB2350/300SK-A4 from G-WAY Microwave is a Band Pass Filter with Frequency 2200 to 2500 MHz, Bandwidth 300 MHz, Center Frequency 2350 MHz, Insertion Loss 0.4 to 0.5 dB, Rejection 60 to 95 dB. Tags: Module with Connectors, Cavity Filter. More details for CB2350/300SK-A4 can be seen below.