The SiMF8/4-11D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 5.9 to 10 GHz, Center Frequency 7.95 GHz, Insertion Loss 1.8 dB, Rejection 30 dB @5.1GHz&11.1GHz, 40 dB @4.7GHz&11.4GHz, 60 dB @DC~4.2GHz, 60 dB @11.6~20GHz, Upper Rejection 30 to 60 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF8/4-11D2 can be seen below.