Ceramic Chimney Heat Insulation Liners from Japan
Fired ceramic liners for chimneys engineered to provide heat insulation, preventing heat loss and protecting surrounding structures. Classified in HTS 6905.90.0010 as other ceramic constructional goods with heat insulating features, meeting fired ceramic criteria in Chapter 69.
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 lab reports confirming low thermal conductivity for insulation claims; ensure documentation distinguishes from refractory bricks in 6902; check for chimney-specific construction use