The WBCGV12-1860-1870-1890-1900-50-4 from Wainwright Instruments is a Band Pass Filter with Frequency 1.87 to 1.89 GHz, Bandwidth 20 MHz, Center Frequency 1.88 GHz, Insertion Loss 3.5 to 4.5 dB, Rejection 50 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCGV12-1860-1870-1890-1900-50-4 can be seen below.