The WRCA6-449-452.5-457.5-461-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 452.5 to 457.5 MHz, Bandwidth 5 MHz, Insertion Loss 0.5 to 0.75 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-449-452.5-457.5-461-40 can be seen below.