The FN-4721W from Filtronetics is a Low Pass RF Filter with Frequency DC to 60 MHz, Stopband Frequency 70 to 185 MHz, 3 dB Cutoff Frequency 60 MHz, Insertion Loss 1.5 dB, Rejection 60 dB. Tags: Drop-In, Module with Connector, Lumped Component Filter. More details for FN-4721W can be seen below.