The SiMF9/R8-6E3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8.6 to 9.4 GHz, Center Frequency 9 GHz, Insertion Loss 2 dB, Rejection 30 dB @8.1GHz&9.95GHz, 40 dB @8GHz&10.1GHz, 60 dB @DC~6GHz, 50 dB @11~14GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF9/R8-6E3 can be seen below.