Cupel for Fire Assay from Canada
Magnesia ceramic cupel absorbing lead in precious metal fire assay analysis. Specifically named in HTS 6903.90.00 refractory goods for metallurgical testing. Bone ash-magnesia fired composition.
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
• Assay lab certification; small size doesn't change refractory status
• Common issue: classified as Chapter 38 chemicals