The WRCA6-424.6-424.9-425.1-425.4-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 424.9 to 425.1 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.5 to 3 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-424.6-424.9-425.1-425.4-40 can be seen below.