The SiMF17R5/1-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 17 to 18 GHz, Center Frequency 17.5 GHz, Insertion Loss 3.2 dB, Rejection 30 dB @16.1GHz&18.7GHz, 40 dB @15.6GHz&18.9GHz, 60 dB @DC~14.2GHz, 50 dB @19.2~28.3GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF17R5/1-7D3 can be seen below.