The ECS-61-32-4X from ECS Inc. International is a RF Quartz Crystal with Frequency 6.144 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 32 pF, Equivalent Series Resistance 100. Tags: Thru Hole. More details for ECS-61-32-4X can be seen below.