The WRCT10-2127.5-2130-2135-2137.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.13 to 2.135 GHz, Bandwidth 5 MHz, Insertion Loss 1.25 to 2.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT10-2127.5-2130-2135-2137.5-40-1 can be seen below.