The SiMF12R5/7-11D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8.8 to 16 GHz, Center Frequency 12.4 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @7.5GHz&17.35GHz, 40 dB @7.1GHz&17.5GHz, 60 dB @DC~6GHz, 50 dB @20~21.9GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF12R5/7-11D2 can be seen below.