The SiMS9R17/R55-6D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8.9 to 9.45 GHz, Center Frequency 9.17 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @8.45GHz&10.15GHz, 40 dB @7.7GHz&12GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS9R17/R55-6D3 can be seen below.