The WRCT8-817.5-820-825-827.5-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 820 to 825 MHz, Bandwidth 5 MHz, Insertion Loss 0.6 to 1.25 dB, Rejection 40 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-817.5-820-825-827.5-40 can be seen below.