Of other glass having a linear coefficient of expansion not exceeding 5x10-6 per Kelvin within a temperature range of 0°C to 300°C
Glass in balls (other than microspheres of heading 70.18), rods or tubes, unworked. > Tubes: > Of other glass having a linear coefficient of expansion not exceeding 5x10-6 per Kelvin within a temperature range of 0°C to 300°C > Of other glass having a linear coefficient of expansion not exceeding 5x10-6 per Kelvin within a temperature range of 0°C to 300°C
Duty Rate (from China)
Products classified under Tariff item 7002.32.00.00
Borosilicate Condensate Trap Tubes
Unworked borosilicate glass tubes designed for cold traps in vacuum distillation systems. Their low linear coefficient of expansion (≤5 x 10⁻⁶/K from 0°C to 300°C) ensures resistance to thermal shock during repeated cycling. These tubes are classified under tariff item 7002.32.00 as unworked glass tubes of low-expansion glass.
7002.32.00Borosilicate Glass Capillary Tubes
Thin-walled, unworked borosilicate capillary tubes with a low expansion coefficient, used in chromatography, medical diagnostics, and precision instrumentation. They meet the tariff item's requirement of a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K within 0°C to 300°C. These tubes are imported in their raw state before any drawing or processing.
7002.32.00Borosilicate Glass Laboratory Tubing
Unworked borosilicate glass tubing with a low linear coefficient of expansion (≤5 x 10⁻⁶/K from 0-300°C), used for fabricating laboratory equipment like test tubes and reaction vessels. The tubing is imported in long lengths without any working or finishing processes. It falls under tariff item 7002.32.00 as unworked tubes of low-expansion glass.
7002.32.00Borosilicate Glass Tubes for Fiber Optic Preforms
Unworked low-expansion glass tubes used as overcladding in fiber optic preform manufacturing for telecommunications cables. These borosilicate tubes have a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K within 0°C to 300°C. They are imported in their raw tube form without any working or processing.
7002.32.00Glass Tubes for High-Temperature Manometers
Borosilicate tubing with low thermal expansion for precision pressure gauges operating at elevated temperatures. These unworked tubes are designed for high-temperature manometers and meet the tariff item's coefficient of expansion requirement. They are imported in raw tube form without any working.
7002.32.00Low-Expansion Glass Rods for Laser Housings
Solid borosilicate rods for thermal mounts in high-power laser systems where dimensional stability is critical. These unworked rods have a low linear coefficient of expansion (≤5 x 10⁻⁶/K) and are imported in their raw state. They fall under tariff item 7002.32.00 as unworked rods of low-expansion glass.
7002.32.00Low-Expansion Glass Rods for Optical Seals
Unworked borosilicate rods designed for hermetic sealing with optical fibers and metal in photonics devices. These rods have a low coefficient of expansion (≤5 x 10⁻⁶/K) and are imported in raw form. They are classified under tariff item 7002.32.00 as unworked rods of low-expansion glass.
7002.32.00Low-Expansion Glass Tubes for Vacuum Systems
Unworked glass tubes of low thermal expansion borosilicate for high-vacuum applications like vacuum manifolds and seals in scientific equipment. These tubes meet the tariff item's requirement of a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K. They are imported in raw tube form without any working.
7002.32.00Pyrex-Type Borosilicate Glass Rods
Unworked solid glass rods made from borosilicate with controlled low thermal expansion (≤5 x 10⁻⁶/K), ideal for stirring rods, thermometer tubes, and scientific instrument components. These rods are imported in their raw state without any working or finishing. They fall under tariff item 7002.32.00 as unworked rods of low-expansion glass.
7002.32.00Thermometer Glass Tubing
Specialty unworked borosilicate tubing with precise bore and low thermal expansion for manufacturing mercury-free thermometers and temperature probes. These tubes meet the tariff item's coefficient of expansion requirement and are imported in raw tube form. They are classified under tariff item 7002.32.00 as unworked tubes of low-expansion glass.