The WVR-1747.5B-75M01 from Wevercomm is a Band Stop Filter with Stopband Frequency 1.71 to 1.785 GHz, Bandwidth 75 MHz, Insertion Loss 2 dB, Rejection 40 dB Min @ 1710MHz to 1785MHz, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-1747.5B-75M01 can be seen below.