The WTRCT10-1850-1910-20-50-70 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.85 to 1.91 GHz, Bandwidth 20 MHz, Insertion Loss 1.25 dB, Rejection 70 dB, Return Loss 14 dB. Tags: Module with Connectors, Cavity Filter, Notch Filter, Tunable Filter. More details for WTRCT10-1850-1910-20-50-70 can be seen below.