The WBCGV4-3500-3540-3560-3600-40-2 from Wainwright Instruments is a Band Pass Filter with Frequency 3.54 to 3.56 GHz, Bandwidth 20 MHz, Center Frequency 3.55 GHz, Insertion Loss 1.75 to 2.5 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCGV4-3500-3540-3560-3600-40-2 can be seen below.