The WRCA6-451.5-453.5-456.5-458.5-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 453.5 to 456.5 MHz, Bandwidth 3 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 WRCA6-451.5-453.5-456.5-458.5-40 can be seen below.