The ECS-260-8-36-RWN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 26 MHz, Frequency Stability ±15 ppm, Frequency Tolerance ±15 ppm, Load Capacitance 8 pF, Equivalent Series Resistance 60. Tags: Surface Mount. More details for ECS-260-8-36-RWN-TR can be seen below.