The MFB-3175CH from Marki Microwave is a Band Pass Filter with Frequency 25.5 to 38 GHz, Center Frequency 31750 MHz, Insertion Loss 1.45 to 3 dB, Upper Rejection 25 to 30 dB, Lower Rejection 25 to 40 dB. Tags: Die, MMIC Filter. More details for MFB-3175CH can be seen below.