Glass Fiber Reinforced Insulation Paper Sheets from Mexico
Composite sheets of paper layers adhered with fiberglass mesh reinforcement for electrical insulation backing in transformers. Falls under HTS 4807.00.92.00 as internally reinforced paper, no surface coating. Provides dielectric strength.
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
• Certify fiberglass as non-woven reinforcement to prevent plastics chapter misclassification
• Declare electrical end-use but emphasize paper as principal material
• Test for impregnation; any varnish coating shifts to 4811 or 8547 composites