The AFL-12000 from Atlantic Microwave is a Low Pass RF Filter with Frequency DC - 10.8 GHz, Stopband Frequency 13.8 - 18.1 GHz, 3 dB Cutoff Frequency 12 GHz, Insertion Loss 1 dB, Rejection 50 dB at 13.8 - 18.1 GHz. Tags: Module with Connector. More details for AFL-12000 can be seen below.