The QLF-3000-40-1 from Qualwave is a Low Pass RF Filter with Frequency DC to 3 GHz, Stopband Frequency 4.5 to 6 GHz, Insertion Loss 1 dB, Upper Rejection 40 dB @ 4.5 GHz, 60 dB @ 6 GHz, Power 10 W. Tags: Module with Connector. More details for QLF-3000-40-1 can be seen below.