The Xtal2520S from Dynamic Engineers is a RF Quartz Crystal with Frequency 16, 24, 26, 40 MHz, Frequency Stability ±15 to ±50 ppm, Drive Power Level 10 to 200 uW, Shunt Capacitance 3 pF, Equivalent Series Resistance 60 to 150 Ohms. Tags: Surface Mount. More details for Xtal2520S can be seen below.