The FMXMC4S Series from Frequency Management International is a RF Quartz Crystal with Frequency 12 to 50 MHz, Frequency Tolerance ±30 ppm, Drive Power Level 10 to 300 µW, Load Capacitance 6 to 60 pF, Shunt Capacitance 7 pF. Tags: Surface Mount. More details for FMXMC4S Series can be seen below.