Glass Liner Inner for Laboratory Vacuum Dewar Flask from Canada
High-purity borosilicate glass inner container for cryogenic vacuum Dewar flasks used in scientific labs to store liquefied gases. The inner wall forms the vacuum space with the outer wall for superior insulation. Falls under HTS 7020.00.4000 as glass inners dedicated to vacuum vessels.
Duty Rate — Canada → United States
16.6%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include lab certification docs proving Dewar flask application to distinguish from general lab glassware in 7017
• Check for thermal shock resistance specs as borosilicate composition affects duty but must match vacuum inner function
• Avoid bulk packing; use individual foam inserts to prevent implosion risks common with thin-walled vacuum glass