The WRCD20-1940.5-1942.5-1957.5-1959.5-40-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9425 to 1.9575 GHz, Bandwidth 15 MHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1940.5-1942.5-1957.5-1959.5-40-2 can be seen below.