The QLF-18000-40 from Qualwave is a Low Pass RF Filter with Frequency DC to 18 GHz, Stopband Frequency 20 to 36 GHz, Insertion Loss 2 dB, Upper Rejection 40 dB @ 20 to 38 GHz, 60 dB @ 36 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-18000-40 can be seen below.