The WRCD20-1870.5-1872.5-1887.5-1889.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8725 to 1.8875 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 WRCD20-1870.5-1872.5-1887.5-1889.5-40-1 can be seen below.