The WTRCD20-1750-1870-10-14-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.75 to 1.87 GHz, Bandwidth 10 MHz, Insertion Loss 2.25 dB, Rejection 40 dB, Return Loss 14 dB. Tags: Module with Connectors, Cavity Filter, Notch Filter, Tunable Filter. More details for WTRCD20-1750-1870-10-14-40 can be seen below.