The MFB-3475CH from Marki Microwave is a Band Pass Filter with Frequency 29.5 to 40 GHz, Center Frequency 34750 MHz, Insertion Loss 1.97 to 3 dB, Upper Rejection 25 to 30 dB, Lower Rejection 40 to 50 dB. Tags: Die, MMIC Filter. More details for MFB-3475CH can be seen below.