The QLF-25000-40 from Qualwave is a Low Pass RF Filter with Frequency DC to 25 GHz, Stopband Frequency 28 to 30 GHz, Insertion Loss 2 dB, Upper Rejection 40 dB @ 28 to 30 GHz, Power 20 W. Tags: Module with Connector. More details for QLF-25000-40 can be seen below.