Lab-Grade Porcelain Watch Glass from Canada
Concave fired porcelain watch glass for covering lab vessels during evaporation. Technical laboratory ceramic under HTS 6909.90.00.00, with porcelain's characteristic translucency and low absorption.
Duty Rate — Canada → United States
14%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include diameter/tolerance specs matching lab beakers for technical proof
• Certify chemical inertness; generic disks risk tile classification
• Package as lab consumables, not decorative coasters