The WTRCT10-2500-2690-10-16-20 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.5 to 2.69 GHz, Bandwidth 10 MHz, Insertion Loss 1.25 dB, Rejection 20 dB, Return Loss 14 dB. Tags: Module with Connectors, Cavity Filter, Notch Filter, Tunable Filter. More details for WTRCT10-2500-2690-10-16-20 can be seen below.