The SiMS24R3/4R7-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 21.7 to 27 GHz, Center Frequency 24.3 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @20GHz&28.8GHz, 40 dB @18.8GHz&29.9GHz, 55 dB @DC~17GHz, 40 dB @30~37GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS24R3/4R7-8D2 can be seen below.