The WRCT20-2582.5-2585-2605-2607.5-50-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.585 to 2.605 GHz, Bandwidth 20 MHz, Insertion Loss 2 to 4.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT20-2582.5-2585-2605-2607.5-50-4 can be seen below.