The WRCGV10-829.5-837-857-864.5-40-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 837 to 857 MHz, Bandwidth 20 MHz, Insertion Loss 1 to 1.5 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCGV10-829.5-837-857-864.5-40-4 can be seen below.