The WRCT16-828-830-840-842-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 830 to 840 MHz, Insertion Loss 1 to 2 dB, Rejection 50 dB, VSWR 1.50:1, Center Frequency 835 MHz. Tags: Module with Connectors, Cavity Filter. More details for WRCT16-828-830-840-842-50-1 can be seen below.