The QLF-4400-40 from Qualwave is a Low Pass RF Filter with Frequency DC to 4.4 GHz, Stopband Frequency 6.28 to 9.8 GHz, Insertion Loss 0.55 to 0.73 dB, Upper Rejection 40 dB @ 6.28 to 9.8 GHz, Power 8 W. Tags: Connectorized. More details for QLF-4400-40 can be seen below.