The WRCT8-813.5-817.5-827.5-831.5-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 817.5 to 827.5 MHz, Bandwidth 10 MHz, Insertion Loss 0.6 to 1 dB, Rejection 40 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-813.5-817.5-827.5-831.5-40 can be seen below.