The WRCA12-878-890-960-972-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 890 to 960 MHz, Bandwidth 70 MHz, Insertion Loss 1.2 to 1 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA12-878-890-960-972-50 can be seen below.