The SiMS13/1-4D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 12.5 to 13.5 GHz, Center Frequency 13 GHz, Insertion Loss 1.8 dB, Rejection 30 dB @11.4GHz&14.4GHz, 40 dB @10.8GHz&15GHz, 50 dB @DC~10.65GHz, 55 dB @10.6~15.7GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS13/1-4D2 can be seen below.