The WRCGV12-827-837-857-867-70-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 837 to 857 MHz, Bandwidth 20 MHz, Insertion Loss 1.25 to 2 dB, Rejection 70 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCGV12-827-837-857-867-70-4 can be seen below.