The RO3118 from Murata is a SAW Resonator with Frequency 317.925 to 318.075 MHz, Centre Frequency 318 MHz, Insertion Loss 1.5 to 2 dB, Capacitance 2.6 to 3 pF, Quality Factor Loaded 1400. Tags: Drop In, SAW Resonator. More details for RO3118 can be seen below.