The WRCT40-1951.7-1952.5-1957.5-1958.3-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9525 to 1.9575 GHz, Bandwidth 5 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 WRCT40-1951.7-1952.5-1957.5-1958.3-50-2 can be seen below.