The WRCT12-1880-1887.5-1912.5-1920-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8875 to 1.9125 GHz, Bandwidth 25 MHz, Insertion Loss 1.5 to 2 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT12-1880-1887.5-1912.5-1920-40 can be seen below.