Refractometer Prism Assembly from Canada
Sapphire prism with calibration scale for Abbe refractometers (9027.20). Critical for measuring refractive index of liquids. Classified 9027.90.84.00 as dedicated optical component.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Specify refractive index range and dispersion correction
• Anti-reflective coatings require optical treatment declaration
• Standalone prisms risk 9001 classification