The WRCT40-1876.7-1877.5-1882.5-1883.3-50-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.8775 to 1.8825 GHz, Bandwidth 5 MHz, Insertion Loss 3.5 to 6.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-1876.7-1877.5-1882.5-1883.3-50-4 can be seen below.