The XTAL7500AX from Dynamic Engineers is a RF Quartz Crystal with Frequency 5.5 to 60 MHz, Frequency Stability ±15, ±20, ±50 ppm, Frequency Tolerance ±10, ±20 ppm, Drive Power Level 100 uW, Load Capacitance 8, 18, 20 pF. Tags: Surface Mount. More details for XTAL7500AX can be seen below.