The WRCT20-1908-1910-1930-1932-40-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.91 to 1.93 GHz, Bandwidth 20 MHz, Insertion Loss 2.25 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT20-1908-1910-1930-1932-40-4 can be seen below.