The WRCT8-939.9-940.4-940.6-941.1-30 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 940.4 to 940.6 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.6 to 2 dB, Rejection 30 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-939.9-940.4-940.6-941.1-30 can be seen below.