The SiMF12R15/2R5-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10.9 to 13.4 GHz, Center Frequency 2.5 GHz, Insertion Loss 2 dB, Rejection 30 dB @10GHz&14.2GHz, 40 dB @9.7GHz&14.4GHz, 60 dB @DC~9GHz, 50 dB @15~22GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF12R15/2R5-8D2 can be seen below.