Refractory Kiln Plug from United States
A cordierite ceramic plug used to seal peepholes in pottery kilns, designed to withstand thermal cycling. This fired refractory plug is shaped from clay-silica mixes and fired, meeting Chapter 69 requirements. It is classified under tariff item 6903.90.00, as plugs are explicitly listed in the heading.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the plug is fired above 800°C; lower-temperature products are excluded
• Provide material composition data to support classification
• If the plug is part of a kiln, check if it should be classified with the kiln under Chapter 84