The FLP-2000 from Marki Microwave is a Low Pass RF Filter with Frequency DC to 19.25 GHz, Stopband Frequency 22.3 to 24 GHz, 3 dB Cutoff Frequency 20 GHz, Insertion Loss 1.2 dB, Rejection 25 to 50 dB. Tags: Module with Connector. More details for FLP-2000 can be seen below.