The B168MB1S from Knowles is a Band Pass Filter with Frequency 15.75 to 17.75 GHz, Bandwidth 2000 MHz, Center Frequency 16.75 GHz, Insertion Loss 2 to 2.75 dB, Rejection 40 to 45 dB. Tags: Surface Mount, Ceramic Filter. More details for B168MB1S can be seen below.