The SiMF12R75/2R6-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 11.4 to 14 GHz, Center Frequency 12.4 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @10.2GHz&15GHz, 40 dB @10GHz&15.2GHz, 60 dB @DC~9GHz, 50 dB @16~25GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF12R75/2R6-8D2 can be seen below.