The WRCT40-2136.7-2137.5-2142.5-2143.3-50-5 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.1375 to 2.1425 GHz, Bandwidth 5 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 WRCT40-2136.7-2137.5-2142.5-2143.3-50-5 can be seen below.