The WBCDB3-903.3-918.5-921.5-936.7-50 from Wainwright Instruments is a Band Pass Filter with Frequency 918.5 to 921.5 MHz, Bandwidth 3 MHz, Center Frequency 920 MHz, Insertion Loss 1 to 1.25 dB, Rejection 50 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCDB3-903.3-918.5-921.5-936.7-50 can be seen below.