The FB-1215SM from Marki Microwave is a Band Pass Filter with Frequency 11.35 to 12.95 GHz, Bandwidth 1.6 GHz, Center Frequency 12.15 GHz, Insertion Loss 2 to 3 dB, Rejection 35 to 50 dB. Tags: Surface Mount. More details for FB-1215SM can be seen below.