The WRCT20-1937.5-1942.5-1957.5-1962.5-80-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9425 to 1.9575 GHz, Bandwidth 15 MHz, Insertion Loss 2.25 to 3.5 dB, Rejection 80 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT20-1937.5-1942.5-1957.5-1962.5-80-1 can be seen below.