The 2297-11 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 100 MHz, Stopband Frequency 140 MHz, 3 dB Cutoff Frequency 100 MHz, Lower Rejection 45 dB@140 MHz, Upper Rejection 0.5 dB@140 MHz. Tags: Plug In. More details for 2297-11 can be seen below.