The QLF-28000-30 from Qualwave is a Low Pass RF Filter with Frequency DC to 28 GHz, Stopband Frequency 30 to 38 GHz, Insertion Loss 2 dB, Upper Rejection 30 dB @ 30 to 38 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-28000-30 can be seen below.