The LFCG-612 from Mini Circuits is a Low Pass RF Filter with Frequency 4.9 to 6.1 GHz, Stopband Frequency 8200 to 18300 MHz, 3 dB Cutoff Frequency 7500 MHz, Insertion Loss 1 to 1.2 dB, Rejection 20 to 40 dB. Tags: Surface Mount, Ceramic Filter. More details for LFCG-612 can be seen below.