High-Purity Graphite Cupel for Fire Assay from Mexico
Specialized graphite cupels used in fire assay for precious metal analysis. Contains over 50% free carbon, fired after shaping for analytical laboratory use. Absorbs lead button during precious metal parting.
Duty Rate — Mexico → United States
10%
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
• Mining/assaying end-use documentation prevents tableware misclassification
• Purity certificates (>99% carbon) support high-carbon heading
• Bulk shipments may qualify for different statistical reporting suffixes