Crystal Puller Seed Holder Chuck from Mexico
Graphite or quartz seed crystal holder with rotation mechanism for initiating boule growth in Czochralski pullers. Essential part for crystal grower machinery under heading 8430. 8431.49.90.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Material purity specs (99.999%+) and temperature rating (>1400°C) required
• Pitfall: graphite articles under 6815 if not machinery part
• Thermal shock test data helpful