The QLF-18000-45 from Qualwave is a Low Pass RF Filter with Frequency DC to 18 GHz, Stopband Frequency 28 to 40 GHz, Insertion Loss 1.2 dB, Upper Rejection 45 dB @ 28 to 40 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-18000-45 can be seen below.