The WRCT40-2121.5-2122.5-2142.5-2143.5-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.1225 to 2.1425 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 WRCT40-2121.5-2122.5-2142.5-2143.5-50-2 can be seen below.