The WRCD20-1755.4-1757.4-1777.4-1779.4-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.7574 to 1.7774 GHz, Bandwidth 20 MHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1755.4-1757.4-1777.4-1779.4-40 can be seen below.