The AFL-15000 from Atlantic Microwave is a Low Pass RF Filter with Frequency DC - 13.5 GHz, Stopband Frequency 17.3 - 21 GHz, 3 dB Cutoff Frequency 15 GHz, Insertion Loss 1 dB, Rejection 50 dB at 17.3 - 21 GHz. Tags: Module with Connector. More details for AFL-15000 can be seen below.