S-Glass Roving for Aerospace Composites from Japan
S-glass rovings offer higher strength than E-glass, used in aerospace structural composites like aircraft skins and rocket casings. Classified under HTS 7019.12.00 as continuous glass fiber rovings for advanced reinforcement applications.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide tensile strength test certificates to distinguish S-glass from standard E-glass for proper valuation
• Ensure declaration of filament diameter and twist level (zero for rovings) to prevent reclassification
• Check for anti-dumping duties on specific glass fiber origins; maintain supply chain traceability