Optical Flint Glass Masses from Japan
Dense flint glass in large, unworked masses with high refractive index, melted for precision optics. Classified in HTS 7001.00.20.00 as other glass in the mass, prior to any shaping or polishing.
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
• Provide refractive index specs in entry docs to prove optical grade without 'worked' status
• Segregate from lead crystal batches (24%+ PbO) to avoid 7013 confusion
• Audit risk high if undervalued; use transaction value with melt cost proofs