The WRCFV8-3540-3600-3800-3860-35 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 3.6 to 3.8 GHz, Bandwidth 200 MHz, Insertion Loss 1.25 to 1.5 dB, Rejection 35 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCFV8-3540-3600-3800-3860-35 can be seen below.