The WRCD20-1763.9-1764.9-1769.9-1770.9-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.7649 to 1.7699 GHz, Bandwidth 5 MHz, Insertion Loss 2 to 4 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1763.9-1764.9-1769.9-1770.9-40 can be seen below.