The WRCD20-1852.9-1854.9-1869.9-1871.9-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8549 to 1.8699 GHz, Bandwidth 15 MHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1852.9-1854.9-1869.9-1871.9-40 can be seen below.