The RO3103D from Murata is a SAW Resonator with Frequency 417.925 to 418.075 MHz, Centre Frequency 418 MHz, Insertion Loss 1.4 to 2 dB, Capacitance 2.4 pF, Quality Factor Loaded 1400. Tags: Surface Mount, SAW Resonator. More details for RO3103D can be seen below.