The WRCD10-1918.125-1919.375-1920.625-1921.875-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 1.919375 to 1.920625 GHz, Bandwidth 1.25 MHz, Insertion Loss 1.25 to 3 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCD10-1918.125-1919.375-1920.625-1921.875-50 can be seen below.