The PSF40B05S from Nuvotronics, Inc. is a Band Pass Filter with Frequency 37.5 to 42.5 GHz, Bandwidth 5000 MHz, Center Frequency 40000 MHz, Insertion Loss 1.1 to 1.5 dB, Upper Rejection 29 to 32 dB @ 45 GHz. Tags: Surface Mount. More details for PSF40B05S can be seen below.