The SiMF9R1/2R2-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8 to 10.2 GHz, Center Frequency 9.1 GHz, Insertion Loss 2 dB, Rejection 30 dB @7.1GHz&11GHz, 40 dB @6.8GHz&11.3GHz, 60 dB @DC~6.2GHz, 50 dB @11.5~20GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF9R1/2R2-8D2 can be seen below.