The WRCT10-1894-1897.5-1902.5-1906-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8975 to 1.9025 GHz, Bandwidth 5 MHz, Insertion Loss 1.25 to 2 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT10-1894-1897.5-1902.5-1906-50-1 can be seen below.