The HG123LA from Microarray Technologies Corporation is a Low Pass RF Filter with Frequency DC to 3 GHz, 3 dB Cutoff Frequency 3 GHz, Insertion Loss 2.1 dB, Rejection 15.5 dB @4.5 GHz, 52 dB @7 GHz, Return Loss Input 20 dB. Tags: Surface Mount. More details for HG123LA can be seen below.