The WRCT40-1839.2-1840-1845-1845.8-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.84 to 1.845 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 WRCT40-1839.2-1840-1845-1845.8-50-2 can be seen below.