The QLF-9000-50-1 from Qualwave is a Low Pass RF Filter with Frequency DC to 9 GHz, Stopband Frequency 15 to 22 GHz, Insertion Loss 1 dB, Upper Rejection 50 dB @ 15 to 22 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-9000-50-1 can be seen below.