The SiMF5R55/R7-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 5.2 to 5.8 GHz, Center Frequency 5.5 GHz, Insertion Loss 4.5 dB, Rejection 30 dB @4.7GHz&6.25GHz, 40 dB @4.5GHz&6.3GHz, 60 dB @DC~4GHz, 60 dB @6.5~10GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF5R55/R7-7D3 can be seen below.