The CB3000/400SK-A1 from G-WAY Microwave is a Band Pass Filter with Frequency 2800 to 3200 MHz, Bandwidth 400 MHz, Center Frequency 3000 MHz, Insertion Loss 1 to 1.5 dB, Rejection 30 to 50 dB. Tags: Module with Connectors, Cavity Filter. More details for CB3000/400SK-A1 can be seen below.