The QLF-18000-35 from Qualwave is a Low Pass RF Filter with Frequency DC to 18 GHz, Stopband Frequency 19 to 28 GHz, Insertion Loss 1.5 dB, Upper Rejection 35 dB @ 19 to 28 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-18000-35 can be seen below.