The SiMF8R9/1-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8.4 to 9.4 GHz, Center Frequency 8.9 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @7.7GHz&10GHz, 40 dB @7.5GHz&10.2GHz, 60 dB @DC~7GHz, 55 dB @10.3~20GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF8R9/1-7D3 can be seen below.