The SiMF13R5/1-4 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 13 to 14 GHz, Center Frequency 13.5 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @12.3GHz&14.7GHz, 40 dB @12.0GHz&14.8GHz, 60 dB @DC~10GHz, 60 dB @15.5~20GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF13R5/1-4 can be seen below.