The SF1575020I from Filtronetics is a Band Pass Filter with Frequency 1565 to 1585 MHz, Bandwidth 20 MHz, Center Frequency 1575 MHz, Insertion Loss 2.7 to 4.5 dB, Upper Rejection 7 to 39 dB. Tags: Surface Mount, RF SAW Filter. More details for SF1575020I can be seen below.