The QLF-11000-50 from Qualwave is a Low Pass RF Filter with Frequency DC to 11 GHz, Stopband Frequency 12.1 to 19 GHz, Insertion Loss 1 to 1.5 dB, Upper Rejection 50 dB @ 12.1 to 19 GHz, Power 15 W. Tags: Module with Connector. More details for QLF-11000-50 can be seen below.