The WRCGV12-811.5-821.5-841.5-851.5-70 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 821.5 to 841.5 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 WRCGV12-811.5-821.5-841.5-851.5-70 can be seen below.