The QLF-20000-50 from Qualwave is a Low Pass RF Filter with Frequency DC to 20 GHz, Stopband Frequency 22 GHz, Insertion Loss 1.2 dB, Upper Rejection 50 dB @ 22 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-20000-50 can be seen below.