The JXS21 from Jauch Quartz is a RF Quartz Crystal with Frequency 16 to 80 MHz, Frequency Stability ± 10 ppm, ±15 ppm, ±20 ppm, ±30 ppm, ±50 ppm, Frequency Tolerance ± 10 to 30 ppm, Drive Power Level 100 µW, Load Capacitance 6 to 12 pF. Tags: Ceramic, Surface Mount. More details for JXS21 can be seen below.