The PSF26B04S from Nuvotronics, Inc. is a Band Pass Filter with Frequency 24.25 to 28.3 GHz, Bandwidth 4050 MHz, Center Frequency 26275 MHz, Insertion Loss 1 dB, Upper Rejection 35 to 45 dB@31 to 48 GHz. Tags: Surface Mount. More details for PSF26B04S can be seen below.