The WRCA12-884-890-960-966-40 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 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA12-884-890-960-966-40 can be seen below.