The WRCA6-491.15-491.8-492.2-492.85-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 491.8 to 492.2 MHz, Bandwidth 0.4 MHz, Insertion Loss 0.5 to 1.5 dB, Rejection 50 dB, VSWR 1.33:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-491.15-491.8-492.2-492.85-50-2 can be seen below.