The ECS-160.003-18-5PXEN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 16.000312 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 18 pF, Equivalent Series Resistance 40. Tags: Surface Mount. More details for ECS-160.003-18-5PXEN-TR can be seen below.