The FCL6-3950-500 from Sirius Microwave is a Band Pass Filter with Frequency 3.68 to 4.23 GHz, Bandwidth 550 MHz, Center Frequency 0 to 4 GHz, Insertion Loss 0.4 dB, Rejection 60 dB. Tags: Through Hole, Combline Filter, Cavity Filter. More details for FCL6-3950-500 can be seen below.