The ECS-260-7-37TC-CZY-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 26 MHz, Frequency Stability ±12 ppm, Frequency Tolerance ±10 ppm, Load Capacitance 7 pF, Equivalent Series Resistance 50. Tags: Surface Mount. More details for ECS-260-7-37TC-CZY-TR can be seen below.