The WRCA6-389.15-389.8-390.2-390.85-50-1 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 389.8 to 390.2 MHz, Bandwidth 0.4 MHz, Insertion Loss 0.5 to 1.5 dB, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-389.15-389.8-390.2-390.85-50-1 can be seen below.