The WRCA6-419.15-419.8-420.2-420.85-50-2 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 419.8 to 420.2 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 WRCA6-419.15-419.8-420.2-420.85-50-2 can be seen below.