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%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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