The QLF-25000-40-2 from Qualwave is a Low Pass RF Filter with Frequency DC to 25 GHz, Stopband Frequency 28 to 44 GHz, Insertion Loss 2 dB, Upper Rejection 40 dB @ 28 to 40GHZ, 70 dB @ 30 to 44 GHz, VSWR 2.00:1. Tags: Module with Connector. More details for QLF-25000-40-2 can be seen below.