The SiMS8R6/R4-6D4 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 8.4 to 8.8 GHz, Center Frequency 8.6 GHz, Insertion Loss 3.5 dB, Rejection 30 dB @7.95GHz&9.15GHz, 40 dB @7.8GHz&9.25GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS8R6/R4-6D4 can be seen below.