The DFS0403R1268P020 from Zhejiang Jiakang Electronics is a Band Pass Filter with Frequency 1.258 to 1.278 GHz, Bandwidth 20 MHz, Center Frequency 1268 MHz, Insertion Loss 1 dB, Rejection 20 dB. Tags: Surface Mount. More details for DFS0403R1268P020 can be seen below.