The WRCT40-1911.5-1912.5-1927.5-1928.5-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9125 to 1.9275 GHz, Bandwidth 15 MHz, Insertion Loss 3.5 to 6 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-1911.5-1912.5-1927.5-1928.5-50-1 can be seen below.