Premium Quartz Crystal Resonators for Reliable Frequency Control. Micro Nano Technology: Only company in China mastering micro/nano processing for quartz crystals. High Stability Aging: Low aging rate of 3ppm/year ensures long-term frequency reliability. Multiple Certifications: ISO19000, RoHS, Pb Free, ISO 9001:2015, IATF16949 certified. Customizable Loading: Loading capacitance options: Series, 6PF, 12PF, 16PF, or Specify. SMD Package Type: Metal Can Type Crystals M3225 Series in SMD format.