The WRCT8-919.4-919.9-920.1-920.6-50 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 919.9 to 920.1 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.6 to 3.5 dB, Rejection 50 dB, VSWR 1.43:1. Tags: Module with Connectors, Cavity Filter. More details for WRCT8-919.4-919.9-920.1-920.6-50 can be seen below.