The WRCA6-389.6-389.9-390.1-390.4-40 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 389.9 to 390.1 MHz, Bandwidth 0.2 MHz, Insertion Loss 0.5 to 3 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCA6-389.6-389.9-390.1-390.4-40 can be seen below.