Heavy-Duty Tapered Natural Cork Lab Flask Stopper
Durable tapered stopper from natural cork for laboratory glassware like Erlenmeyer flasks, with length > diameter for lab sealing. Under HTS 4503.10.40.00 as other tapered natural cork stoppers. Used in chemical and biological experiments.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-tapered lab-grade corks
Other shapes of natural cork articles fall into broader subheadings.
If imported as lab apparatus parts
Contextual use in lab instruments may classify under Chapter 90.
If agglomerated for lab durability
Synthetic cork for labs uses agglomerated materials under 4504.
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Import Tips & Compliance
• Include end-use declaration as labware to avoid consumer goods treatment
• Test for chemical resistance in docs, as impurities shift classification
• Bulk lab imports need precise counting for duty calculation
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