The WRCTG12+8-1848-1850-1910-1912-20-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.85 to 1.91 GHz, Bandwidth 60 MHz, Insertion Loss 2 to 3.5 dB, Rejection 20 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCTG12+8-1848-1850-1910-1912-20-4 can be seen below.