The WRCT40-2582-2583-2603-2604-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.583 to 2.603 GHz, Bandwidth 20 MHz, Insertion Loss 3 to 6 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-2582-2583-2603-2604-50-1 can be seen below.