The WRCGV12-1860-1870-1890-1900-75-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.87 to 1.89 GHz, Bandwidth 20 MHz, Insertion Loss 1 to 2.5 dB, Rejection 75 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCGV12-1860-1870-1890-1900-75-4 can be seen below.