The SiMS6/R6-6D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 5.7 to 6.3 GHz, Center Frequency 6 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @5.3GHz&6.7GHz, 40 dB @5.2GHz&6.75GHz, 60 dB @DC~3GHz, 45 dB @8~13GHz, Upper Rejection 30 to 45 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS6/R6-6D3 can be seen below.