The SF3030AO-1055MHz-A from Dynamic Engineers is a Band Pass Filter with Frequency 1033 to 1077 MHz, Bandwidth 44 MHz, Center Frequency 1055 MHz, Insertion Loss 3.8 to 4.2 dB, Rejection 10 to 32 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-1055MHz-A can be seen below.