Low-Expansion Glass Tubes for Vacuum Systems from Mexico
Unworked glass tubes of low thermal expansion borosilicate for high-vacuum applications like vacuum manifolds and seals in scientific equipment. Falls under 7002.32.00.00 as unworked tubes meeting the precise expansion coefficient requirement.
Duty Rate — Mexico → United States
16%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide technical specs documenting the 0-300°C expansion coefficient to prevent misclassification as ordinary glass
• Use wooden crates with dividers for transport; breakage claims common without proper packing declaration