The 2455 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 45 MHz, Stopband Frequency 60 MHz, 3 dB Cutoff Frequency 45 MHz, Lower Rejection 60 dB@60 MHz, Upper Rejection 0.5 dB@60 MHz. Tags: Plug In. More details for 2455 can be seen below.