The RO3118E from Murata is a SAW Resonator with Frequency 317.925 to 318.075 MHz, Centre Frequency 318 MHz, Insertion Loss 1.6 to 2.2 dB, Capacitance 2.8 pF, Quality Factor Loaded 1500. Tags: Surface Mount, SAW Resonator. More details for RO3118E can be seen below.