The FN-3336W from Filtronetics is a Low Pass RF Filter with Frequency DC to 453 MHz, Stopband Frequency 500 MHz to 3 GHz, 3 dB Cutoff Frequency 453 MHz, Insertion Loss 0.25 dB, Rejection 45 dB. Tags: Module with Connector. More details for FN-3336W can be seen below.