The WBCTB3-907.5-917.5-921.5-931.5-40 from Wainwright Instruments is a Band Pass Filter with Frequency 917.5 to 921.5 MHz, Bandwidth 4 MHz, Center Frequency 919.5 MHz, Insertion Loss 1.25 to 2 dB, Rejection 40 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB3-907.5-917.5-921.5-931.5-40 can be seen below.