The WRCA6-431-433-435-437-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 433 to 435 MHz, Bandwidth 2 MHz, Insertion Loss 0.4 to 0.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-431-433-435-437-50-1 can be seen below.