The SiMF9/2-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8 to 10 GHz, Center Frequency 9 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @7.15GHz&10.75GHz, 40 dB @6.9GHz&10.9GHz, 60 dB @DC~6.2GHz, 55 dB @11~20GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF9/2-8D2 can be seen below.