The WRCFV8-3480-3490-3510-3520-40-4 from Wainwright Instruments is a Band Stop Filter with Stopband Frequency 3.49 to 3.51 GHz, Bandwidth 20 MHz, Insertion Loss 1.5 to 2 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter. More details for WRCFV8-3480-3490-3510-3520-40-4 can be seen below.