The SiMS19R5/5-8D1 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 17.5 to 22 GHz, Center Frequency 19.75 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @15.3GHz&23.8GHz, 40 dB @14GHz&25GHz, 60 dB @DC~10GHz, 45 dB @28~38GHz, Upper Rejection 30 to 45 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS19R5/5-8D1 can be seen below.