The 2289_32 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 32 MHz, Stopband Frequency 36.96 MHz, 3 dB Cutoff Frequency 32 MHz, Lower Rejection 45 [email protected] MHz, Upper Rejection 4 [email protected] MHz. Tags: Plug In. More details for 2289_32 can be seen below.