The ACTR315/315.0/TO39 from Advanced Crystal Technology is a SAW Resonator with Frequency 314.85 to 315.15 MHz, Centre Frequency 315 MHz, Insertion Loss 1.5 to 2 dB, Capacitance 2.3 to 2.9 pF, Quality Factor Loaded 2000. Tags: Drop In, SAW Resonator. More details for ACTR315/315.0/TO39 can be seen below.