The WRCA12-812-824-894-906-50-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 824 to 894 MHz, Bandwidth 70 MHz, Insertion Loss 1.2 to 1 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA12-812-824-894-906-50-4 can be seen below.