The WRCT12-803-806-825-828-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 806 to 825 MHz, Bandwidth 19 MHz, Insertion Loss 0.75 to 1 dB, Rejection 30 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT12-803-806-825-828-30 can be seen below.