The 2289-75-S from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 75 MHz, Stopband Frequency 87 MHz, 3 dB Cutoff Frequency 75 MHz, Lower Rejection 45 dB@87 MHz, Upper Rejection 4 dB@87 MHz. Tags: Surface Mount. More details for 2289-75-S can be seen below.