The SiMF13R5/3R4-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 11.8 to 15.2 GHz, Center Frequency 13.5 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @10.7GHz&16.3GHz, 40 dB @ 10.2GHz&16.6GHz, 60 dB @ DC~9.5GHz, 60 dB @17~21GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF13R5/3R4-8D2 can be seen below.