The LFCG-3800+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 3900 MHz, Bandwidth 3900 MHz, 3 dB Cutoff Frequency 5000 MHz, Insertion Loss 1.3 to 1.8 dB, Rejection 20 to 48 dB. Tags: Surface Mount, Ceramic Filter. More details for LFCG-3800+ can be seen below.