The QLF-18000-15 from Qualwave is a Low Pass RF Filter with Frequency DC to 18 GHz, Stopband Frequency 20 GHz, Insertion Loss 1 dB, Upper Rejection 15 dB @ 20 GHz, VSWR 1.70:1. Tags: Module with Connector. More details for QLF-18000-15 can be seen below.