The SWF-75379340-15-L1 from ERAVANT is a Waveguide Filter with Frequency 50 to 75 GHz, Insertion Loss 1.5 dB, Operating Temperature -40 to 85 Degree C, Rejection 40 dB, Rejection Frequency 79 to 120 GHz. Tags: Low Pass. More details for SWF-75379340-15-L1 can be seen below.