The SiMF17R2/1R2-6D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 16.6 to 17.8 GHz, Center Frequency 17.2 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @15.7GHz&18.8GHz, 40 dB @15.5GHz&19.1GHz, 60 dB @DC~13.5GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF17R2/1R2-6D3 can be seen below.