The SiMF17/2R4-7D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 15.8 to 18.2 GHz, Center Frequency 17 GHz, Insertion Loss 2 dB, Rejection 30 dB @14.4GHz&19.4GHz, 40 dB @13.7GHz&19.6GHz, 60 dB @DC~12.5GHz, 40 dB @19.6~29GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF17/2R4-7D2 can be seen below.