The SiMS11R6/R4-8D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 11.4 to 11.8 GHz, Center Frequency 11.6 GHz, Insertion Loss 4 dB, Rejection 30 dB @10.9&12.3GHz, 40 dB @10.7&12.4GHz, 55 dB @DC~10.4GHz, 60 dB @14~24GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS11R6/R4-8D3 can be seen below.