The SiMF16/R4-4E4 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 15.8 to 16.3 GHz, Center Frequency 16.05 GHz, Insertion Loss 4 dB, Rejection 30 dB @15.1GHz&17GHz, 40 dB @15GHz&17.1GHz, 60 dB @DC~14.4GHz, 40 dB @17.1~29GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF16/R4-4E4 can be seen below.