The WRCJV12-1690-1710-1785-1805-50-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.71 to 1.785 GHz, Bandwidth 75 MHz, Insertion Loss 1 to 2.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCJV12-1690-1710-1785-1805-50-4 can be seen below.