The 2156-65-50 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 65 MHz, Stopband Frequency 130 MHz, 3 dB Cutoff Frequency 65 MHz, Lower Rejection 40 dB@130 MHz, Upper Rejection 1 dB@130 MHz. Tags: Plug In. More details for 2156-65-50 can be seen below.