The WRCT5-917.4-918.1-918.3-919-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 918.1 to 918.3 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.5 to 2.25 dB, Rejection 40 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT5-917.4-918.1-918.3-919-40 can be seen below.