Circular Trig Disc Calculator from Canada
A pocket-sized rotating disc calculator for trigonometric functions, used in surveying and construction for angle and side calculations. Classified in HTS 9017.20.4000 as a disc-type mathematical instrument. Typically printed on heavy cardstock or plastic with locking mechanism.
Duty Rate — Canada → United States
13.9%
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
• Label as 'mathematical instrument' not 'chart;' graphical aids risk Chapter 49 classification
• Bulk imports for construction firms need end-use statements to prevent toy misclassification
• Ensure discs rotate freely; seized/stuck units classified as printed matter