The AFL-16000 from Atlantic Microwave is a Low Pass RF Filter with Frequency DC - 14.4 GHz, Stopband Frequency 18.4 - 21.5 GHz, 3 dB Cutoff Frequency 16 GHz, Insertion Loss 1 dB, Rejection 50 dB at 18.4 - 21.5 GHz. Tags: Module with Connector. More details for AFL-16000 can be seen below.