The WTRCT10-1710-1770-20-40-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.71 to 1.77 GHz, Bandwidth 20 MHz, Insertion Loss 1.25 dB, Rejection 50 dB, Return Loss 14 dB. Tags: Module with Connectors, Cavity Filter, Notch Filter, Tunable Filter. More details for WTRCT10-1710-1770-20-40-50 can be seen below.