The WRCD20-1898-1900-1920-1922-40-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.9 to 1.92 GHz, Insertion Loss 2 to 3.5 dB, Rejection 40 dB, VSWR 1.50:1, Center Frequency 1.91 GHz. Tags: Module with Connectors, Cavity Filter. More details for WRCD20-1898-1900-1920-1922-40-1 can be seen below.