The BP4G-2G-CD-SFF from Quantic PMI (Planar Monolithics) is a Band Pass Filter with Frequency 3 to 5 GHz, Bandwidth 2000 MHz, Center Frequency 4000 MHz, Insertion Loss 4 dB, VSWR 1.50:1. Tags: Module with Connectors, Lumped Component Filter. More details for BP4G-2G-CD-SFF can be seen below.