The HF0AA2180A7 from KYOCERA AVX is a RF High Pass Filter with Frequency 2.18 to 6.50 GHz, Bandwidth 4320 MHz, Insertion Loss 0.73 to 1.20 dB, Power 2 W, Rejection 30 to 40 dB. Tags: Surface Mount, PCB Mount, Ceramic Filter. More details for HF0AA2180A7 can be seen below.