The WRCT40-1834-1835-1850-1851-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.835 to 1.85 GHz, Bandwidth 15 MHz, Insertion Loss 3.5 to 6 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT40-1834-1835-1850-1851-50-2 can be seen below.