The ECS-25-S-1X from ECS Inc. International is a RF Quartz Crystal with Frequency 2.5 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 20 pF, Equivalent Series Resistance 300. Tags: Thru Hole. More details for ECS-25-S-1X can be seen below.