The WBLB-T-BP-6000-4000-13C from A-Info is a Band Pass Filter with Frequency 4 to 8 GHz, Insertion Loss 1.5 dB, Rejection 40 to 60 dB, VSWR 2.00:1. Tags: Module with Connectors, Cavity Filter. More details for WBLB-T-BP-6000-4000-13C can be seen below.