The SiMF12/2R2-7D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10.9 to 13.1 GHz, Center Frequency 12 GHz, Insertion Loss 1.6 dB, Rejection 40 dB @DC~9.4GHz, 40 dB @14.2~20GHz, Upper Rejection 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF12/2R2-7D2 can be seen below.