The QLF-13000-50 from Qualwave is a Low Pass RF Filter with Frequency DC to 13 GHz, Stopband Frequency 14.1 to 21 GHz, Insertion Loss 1 to 2 dB, Upper Rejection 50 dB @ 14.1 to 21 GHz, Power 15 W. Tags: Module with Connector. More details for QLF-13000-50 can be seen below.