The WRCA6-912.5-918.5-922.5-928.5-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 918.5 to 922.5 MHz, Bandwidth 4 MHz, Insertion Loss 0.6 to 0.7 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-912.5-918.5-922.5-928.5-50-1 can be seen below.