The 87SMX from IQD Frequency Products is a RF Quartz Crystal with Frequency 3.01 to 100 MHz, Frequency Stability ±50 to ±500 ppm, Frequency Tolerance ±30 to ±100 ppm, Drive Power Level 50 to 300 µW, Load Capacitance 10 to 32 pF. Tags: Surface Mount. More details for 87SMX can be seen below.