The FLP-1940 from Marki Microwave is a Low Pass RF Filter with Frequency DC to 17.8 GHz, Stopband Frequency 26.5 to 60 GHz, 3 dB Cutoff Frequency 19.4 GHz, Insertion Loss 0.9 dB, Rejection 25 to 50 dB. Tags: Module with Connector. More details for FLP-1940 can be seen below.