The SiMF15R25/6R5-8D1 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 12 to 18.5 GHz, Center Frequency 15.25 GHz, Insertion Loss 1.3 dB, Rejection 30 dB @10.3GHz&19.8GHz, 40 dB @9.2GHz&20GHz, 60 dB @DC~7.2GHz, 40 dB @20~27.5GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF15R25/6R5-8D1 can be seen below.