The WRCT20-2642.5-2645-2665-2667.5-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 2.645 to 2.665 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 WRCT20-2642.5-2645-2665-2667.5-50-2 can be seen below.