The ECS-3X10X from ECS Inc. International is a RF Quartz Crystal with Frequency 3.5 to 9.83 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±50 ppm, Drive Power Level 50 to 100 µW, Load Capacitance 16 pF. Tags: Thru Hole. More details for ECS-3X10X can be seen below.