The WVR-815B-30M01 from Wevercomm is a Band Stop Filter with Stopband Frequency 800 to 830 MHz, Bandwidth 30 MHz, Insertion Loss 1 dB, Rejection 50 dB Min @ 800MHz to 830MHz, Power 75 W. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-815B-30M01 can be seen below.