The SF3030AO-1056MHz-B from Dynamic Engineers is a Band Pass Filter with Frequency 1041 to 1071 MHz, Bandwidth 30 MHz, Center Frequency 1056 MHz, Insertion Loss 2.6 to 3.8 dB, Rejection 22 to 46 dB. Tags: Surface Mount, RF SAW Filter. More details for SF3030AO-1056MHz-B can be seen below.