The QLF-20000-25 from Qualwave is a Low Pass RF Filter with Frequency DC to 20 GHz, Stopband Frequency 23 to 40 GHz, Insertion Loss 2 dB, Upper Rejection 25 dB @ 23 to 40 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-20000-25 can be seen below.