The SiMF26R05/R4-4W3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 25.85 to 26.25 GHz, Center Frequency 24.6 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @25GHz&27.2GHz, 40 dB @24.6GHz&28GHz, 60 dB @DC~10GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF26R05/R4-4W3 can be seen below.