The ECS-120-32-5PX-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 12 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 32 pF, Equivalent Series Resistance 50. Tags: Surface Mount. More details for ECS-120-32-5PX-TR can be seen below.