The WBCGV4-3650-3690-3710-3750-40 from Wainwright Instruments is a Band Pass Filter with Frequency 3.69 to 3.71 GHz, Bandwidth 20 MHz, Center Frequency 3.7 GHz, Insertion Loss 1.75 to 2.5 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCGV4-3650-3690-3710-3750-40 can be seen below.