The SiMF8R1/R5-3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 7.9 to 8.4 GHz, Center Frequency 8.15 GHz, Insertion Loss 2.8 dB, Rejection 30 dB @7.3GHz&8.95GHz, 40 dB @7.2GHz&9.1GHz, 60 dB @DC~5GHz, 60 dB @10~11.5GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF8R1/R5-3 can be seen below.