The WBCTB10-1862.5-1870-1890-1897.5-40-2 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 2.5 to 3.5 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB10-1862.5-1870-1890-1897.5-40-2 can be seen below.