The SiMS34R9/3R8-5W2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 33 to 36.8 GHz, Center Frequency 34.9 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @29GHz&41.5GHz, 40 dB @DC~26GHz&45GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS34R9/3R8-5W2 can be seen below.