The DR1-3180 from ECS Inc. International is a SAW Resonator with Frequency 317.925 to 318.075 MHz, Centre Frequency 318 MHz, Insertion Loss 2 dB, Capacitance 2.2 to 2.3 pF, Quality Factor Loaded 2100 Q. Tags: Drop In, SAW Resonator. More details for DR1-3180 can be seen below.