The SiMS11R7/R12-8D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 11.35 to 11.8 GHz, Center Frequency 11.57 GHz, Insertion Loss 4.5 dB, Rejection 30 dB @10.9GHz&12.3GHz, 40 dB @10.7GHz&12.35GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS11R7/R12-8D3 can be seen below.