Crystal Puller Vacuum Chamber Lid from Canada
Stainless steel lid with viewport and ports for Czochralski puller vacuum chambers, maintaining argon atmosphere during growth. Double O-ring seal design. Structural part of crystal growing equipment in 8442.40.00.00.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Helium leak test certification (<10^-9 atm cc/sec) required for vacuum integrity
• Port configurations (thermocouple, seed lift) must match puller specifications
• Include material certs (316L SS) for high-temperature vacuum service