The SiMF5/2R2-3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4 to 6 GHz, Center Frequency 5 GHz, Insertion Loss 1.8 dB, Rejection 30 dB @3.3GHz&6.7GHz, 40 dB @3.1GHz&6.9GHz, 60 dB @DC~2.5GHz, 60 dB @7.05~11.7GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF5/2R2-3 can be seen below.