The WRCT8-827.5-831.5-841.5-845.5-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 831.5 to 841.5 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 WRCT8-827.5-831.5-841.5-845.5-40-1 can be seen below.