The SF1030300A from Filtronetics is a Band Pass Filter with Frequency 1.015 to 1.045 GHz, Bandwidth 30 MHz, Center Frequency 1030 MHz, Insertion Loss 2.4 to 3.5 dB, Rejection 25 to 31 dB. Tags: Surface Mount, RF SAW Filter. More details for SF1030300A can be seen below.