The H120XHXS from Knowles is a RF High Pass Filter with Frequency 12.5 to 30 GHz, Bandwidth 17.5 GHz, Insertion Loss 1 to 2.5 dB, Rejection 30 dB, Lower Rejection 30 dB. Tags: Surface Mount, Ceramic Filter. More details for H120XHXS can be seen below.