The QLF-300-60 from Qualwave is a Low Pass RF Filter with Frequency DC to 0.3 GHz, Stopband Frequency 0.643 to 3 GHz, Insertion Loss 0.5 dB, Upper Rejection 60 dB @ 0.643 to 3 GHz, Power 1 W. Tags: Module with Connector. More details for QLF-300-60 can be seen below.