Crystal Puller Vacuum Chamber Lid from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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