The SiMF9/2R25-7D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 7.85 to 10.15 GHz, Center Frequency 9 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @6.85GHz&10.95GHz, 40 dB @6.6GHz&11.2GHz, 60 dB @DC~5.3GHz, 55 dB @11.4~16GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF9/2R25-7D2 can be seen below.