The XTAL2520AX from Dynamic Engineers is a RF Quartz Crystal with Frequency 12 to 60 MHz, Frequency Stability ±15, ±20, ±50, ±100 ppm, Frequency Tolerance ±10, ±20, ±50 ppm, Drive Power Level 10 to 100 uW, Load Capacitance 8, 18, 20 pF. Tags: Surface Mount. More details for XTAL2520AX can be seen below.