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HS Code 70023200 - glass tubes low expansion coefficient unworked

Tubes of glass having a linear coefficient of expansion <= 5 x 10-6 per kelvin within a temperature range of 0°C to 300°C, unworked (excl. tubes of glass having a linear coefficient of expansion <= 5 x 10-6 per kelvin within a temperature range of 0°C to 300°C)

Can be used for an export declaration.
(Combined Nomenclature, Customs Tariff Number)

Examples (No official information or warranty)

- Fused quartz tubes
- Fused silica tubes
- Borosilicate glass tubes (e.g., Schott Duran, Corning Pyrex)
- Low expansion glass-ceramic tubes
- Clear fused quartz tubing
- Opaque fused silica tubes
- Vycor glass tubes