The ECS-250-10-36Q-EP-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 25 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 10 pF, Equivalent Series Resistance 60. Tags: Surface Mount. More details for ECS-250-10-36Q-EP-TR can be seen below.