The WRCT10-2525-2530-2540-2545-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.53 to 2.54 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 WRCT10-2525-2530-2540-2545-40-1 can be seen below.