The WTRCT5-919-923-0.2-1.2-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 919 to 923 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.75 dB, Rejection 40 dB, Return Loss 14 dB. Tags: Module with Connectors, Cavity Filter, Notch Filter, Tunable Filter. More details for WTRCT5-919-923-0.2-1.2-40 can be seen below.