The QLF-1000-30 from Qualwave is a Low Pass RF Filter with Frequency DC to 1 GHz, Stopband Frequency 1.9 to 5 GHz, Insertion Loss 0.9 dB, Upper Rejection 30 dB @ 1.9 to 5 GHz, Power 10 W. Tags: Connectorized. More details for QLF-1000-30 can be seen below.