The WRCT8-833-835.5-840.5-843-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 835.5 to 840.5 MHz, Bandwidth 5 MHz, Insertion Loss 0.6 to 1.5 dB, Rejection 50 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-833-835.5-840.5-843-50 can be seen below.