The WRCT20-2120.5-2122.5-2142.5-2144.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.1225 to 2.1425 GHz, Bandwidth 20 MHz, Insertion Loss 2.25 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT20-2120.5-2122.5-2142.5-2144.5-40-1 can be seen below.