The SiMF6R6/R4-6E3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 6.4 to 6.8 GHz, Center Frequency 6.6 GHz, Insertion Loss 2.3 dB, Rejection 25 dB @6.1GHz&7.1GHz, =40 dB @5.9GHz&7.4GHz, 60 dB @DC~5.3GHz, 50 dB @7.35~12.5GHz, Upper Rejection 25 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF6R6/R4-6E3 can be seen below.