The WVR-788B-30M-01 from Wevercomm is a Band Stop Filter with Stopband Frequency 773 to 803 MHz, Bandwidth 30 MHz, Insertion Loss 1 dB, Rejection 30 dB, Power 40 W. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-788B-30M-01 can be seen below.