The QLF-18000-50 from Qualwave is a Low Pass RF Filter with Frequency DC to 18 GHz, Stopband Frequency 19.1 to 26 GHz, Insertion Loss 1 to 3 dB, Upper Rejection 50 dB @ 19.1 to 26 GHz, Power 15 W. Tags: Module with Connector. More details for QLF-18000-50 can be seen below.