The WRCT10-2583-2588-2598-2603-40-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.588 to 2.598 GHz, Bandwidth 10 MHz, Insertion Loss 1.25 to 1.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT10-2583-2588-2598-2603-40-2 can be seen below.