The CB3912.5/575SK-A from G-WAY Microwave is a Band Pass Filter with Frequency 3625 to 4200 MHz, Bandwidth 575 MHz, Center Frequency 3912.5 MHz, Insertion Loss 0.6 dB, Rejection 60 to 80 dB. Tags: Module with Connectors, Cavity Filter. More details for CB3912.5/575SK-A can be seen below.