The AFL-04000 from Atlantic Microwave is a Low Pass RF Filter with Frequency DC - 3.6 GHz, Stopband Frequency 4.6 - 10 GHz, 3 dB Cutoff Frequency 4 GHz, Insertion Loss 1 dB, Rejection 50 dB at 4.6 - 10 GHz. Tags: Module with Connector. More details for AFL-04000 can be seen below.