The WBCTB10-1937.5-1945-1965-1972.5-40-1 from Wainwright Instruments is a Band Pass Filter with Frequency 1.945 to 1.965 GHz, Bandwidth 20 MHz, Center Frequency 1.955 GHz, Insertion Loss 2.5 to 3.5 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB10-1937.5-1945-1965-1972.5-40-1 can be seen below.