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%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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