The SWF-34337340-28-L1 from ERAVANT is a Waveguide Filter with Frequency 22 to 34 GHz, Insertion Loss 1 dB, Operating Temperature -40 to 85 Degree C, Rejection 40 dB, Rejection Frequency 37 GHz. Tags: Low Pass. More details for SWF-34337340-28-L1 can be seen below.