Transformer Pressboard from Japan
High-density pressboard weighing over 225 g/m², made from compressed wood fibers, used as insulation in oil-immersed electrical transformers. It falls under HTS 4805.93.20.00 as uncoated pressboard, not further worked beyond note 3 specifications, in sheets for electrical 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
• Verify grammage exceeds 225 g/m² via lab testing; customs may require certification to confirm pressboard specs
• Provide end-use declaration for electrical insulation to avoid reclassification; include transformer manufacturer specs
• Watch for moisture content limits under 8% to prevent mold issues during transit; common pitfall is improper packing