The ECS-3X9X from ECS Inc. International is a RF Quartz Crystal with Frequency 4 to 70 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-3X9X can be seen below.