The SiMS11R75/2R5-9D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10.5 to 13 GHz, Center Frequency 11.750 GHz, Insertion Loss 1.2 dB, Rejection 30 dB @8.8GHz&14.4GHz, 40 dB @7.5GHz&14.7GHz, 60 dB @DC~5.5GHz, 40 dB @15~30GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS11R75/2R5-9D2 can be seen below.