The 2370 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 25 MHz, Stopband Frequency 39 MHz, 3 dB Cutoff Frequency 25 MHz, Lower Rejection 47 dB@39 MHz, Upper Rejection 0.2 dB@39 MHz. Tags: Plug In. More details for 2370 can be seen below.