The WRCT10-2587-2590-2600-2603-35-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.59 to 2.6 GHz, Bandwidth 10 MHz, Insertion Loss 1.25 to 2.5 dB, Rejection 35 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT10-2587-2590-2600-2603-35-2 can be seen below.