The WBCGV4-3450-3490-3510-3550-40-1 from Wainwright Instruments is a Band Pass Filter with Frequency 3.49 to 3.51 GHz, Bandwidth 20 MHz, Center Frequency 3.5 GHz, Insertion Loss 1.75 to 2.5 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCGV4-3450-3490-3510-3550-40-1 can be seen below.