The WRCD20-1950.5-1952.5-1972.5-1974.5-40-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9525 to 1.9725 GHz, Bandwidth 20 MHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1950.5-1952.5-1972.5-1974.5-40-2 can be seen below.