Alumina Thermocouple Protection Tube from Canada
Fired alumina ceramic tube (99% Al2O3) protecting thermocouples in high-temperature furnaces and kilns. Essential refractory component for temperature measurement in industrial processes, falling under HTS 6903.20.00.00.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide dimensional specs and temperature ratings to confirm refractory classification
• Label as 'refractory ceramic tube' distinctly from electrical insulators (excluded per Chapter 69 notes)
• Batch test for water absorption if stoneware confusion arises during inspection