Borosilicate Watch Glass 100mm
A 100mm concave watch glass made of low-expansion borosilicate, used to cover beakers and prevent contamination during experiments. Its thermal shock resistance and glass composition align with tariff item 7017.20.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the watch glass is ground or polished to optical precision
Optically worked glass may fall under Chapter 90.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the watch glass is unworked beyond cutting or shaping, as per chapter note 2
• Declare under 7017.20.00, and provide product specifications for thermal expansion
Related Products under Tariff item 7017.20.00
Borosilicate Funnel 100mm Buchner
A 100mm Buchner funnel made of borosilicate glass with a sintered glass disc, designed for vacuum filtration under heat or chemical exposure. Its low linear coefficient of expansion (≤5x10-6 per Kelvin) ensures thermal shock resistance, qualifying it under tariff item 7017.20.00.
Borosilicate Gas Washing Bottle 250ml
A 250ml gas washing bottle with a fritted disc, made of low-expansion borosilicate glass for chemical resistance and thermal stability. It is used in laboratory gas scrubbing processes, meeting the thermal expansion criteria of tariff item 7017.20.00.
Borosilicate Glass Beaker 500ml
A 500ml laboratory beaker made of borosilicate glass (e.g., Pyrex) with a low linear coefficient of expansion not exceeding 5x10-6 per Kelvin, enabling it to withstand thermal shock. It is graduated for approximate measurements and used in general lab heating and mixing tasks.
Borosilicate Mortar and Pestle 100ml
A 100ml borosilicate mortar and pestle set for grinding samples in laboratories, featuring low thermal expansion for resistance to heat during use. It is used in pharmaceutical compounding and meets the coefficient of expansion requirement of tariff item 7017.20.00.
Borosilicate pH Electrode Protector Tube
A protective tube for pH electrodes, made of low-expansion borosilicate glass for chemical immersion in laboratory settings. Its thermal stability and glass composition align with tariff item 7017.20.00, as it is a glass part used in lab equipment.
Borosilicate Test Tube 20x150mm
20x150mm rimless test tubes made of borosilicate glass, designed for heating samples in laboratories. The low-expansion glass ensures resistance to thermal shock, meeting the specifications of tariff item 7017.20.00.