The WRCT40-1951.5-1952.5-1972.5-1973.5-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9525 to 1.9725 GHz, Bandwidth 20 MHz, Insertion Loss 3.5 to 6.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-1951.5-1952.5-1972.5-1973.5-50-1 can be seen below.