The WRHFV5-428-433-435-440-20 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 433 to 435 MHz, Bandwidth 2 MHz, Insertion Loss 0.75 to 1 dB, Rejection 20 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRHFV5-428-433-435-440-20 can be seen below.