The WRCT10-2581.5-2585.5-2600.5-2604.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.5855 to 2.6005 GHz, Bandwidth 15 MHz, Insertion Loss 1.25 to 2 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT10-2581.5-2585.5-2600.5-2604.5-40-1 can be seen below.