The SiMF5/1-7D1 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4.5 to 5.5 GHz, Center Frequency 5 GHz, Insertion Loss 3 dB, Rejection 30 dB @3.85GHz&6.15GHz, 40 dB @3.7GHz&6.2GHz, 60 dB @DC~3GHz, 55 dB @8~12GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF5/1-7D1 can be seen below.