The SiMF8/1-7D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 7.4 to 8.6 GHz, Center Frequency 8 GHz, Insertion Loss 2.6 dB, Rejection 30 dB @6.8GHz&9.3GHz, 40 dB @6.6GHz&9.5GHz, 60 dB @DC~6.3GHz, 55 dB @10~18GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF8/1-7D3 can be seen below.