The SiMF9R2/R1-4E4 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 9.18 to 9.22 GHz, Center Frequency 9.2 GHz, Insertion Loss 3.5 dB, Rejection 25 dB @8.85GHz&9.6GHz, 40 dB @8.6GHz&9.8GHz, 60 dB @DC~7.5GHz, 50 dB @11~14.5GHz, Upper Rejection 25 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF9R2/R1-4E4 can be seen below.