The WRCT40-2644-2645-2665-2666-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.645 to 2.665 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 WRCT40-2644-2645-2665-2666-50-2 can be seen below.