Borosilicate Glass Test Tubes
Unworked borosilicate glass tubes used primarily in laboratory settings for scientific experiments and sample containment. They fall under HTS 7002.39.00 as unworked glass tubes, without any drawn, blown, or further processing beyond basic tube formation. These tubes are essential for applications requiring thermal resistance and chemical durability.
Import Duty Rates by Country of Origin
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 drawn or tooled at one or both ends
Tubes with drawn or tooled ends are classified as 'drawn or blown' rather than unworked under heading 7002.
If sold as complete laboratory apparatus
Assembled lab glassware like finished test tube racks or stands falls under laboratory glassware, not raw unworked tubes.
If cut to specific lengths and packaged for retail
Glass tubes cut and retail-packaged become 'other glass articles' rather than bulk unworked material.
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Import Tips & Compliance
• Verify the tubes are unworked (no cutting, annealing post-formation, or coatings) to avoid reclassification under 7002.32 or Chapter 70 worked glass
• Provide chemical composition certificates confirming borosilicate material for customs valuation and compliance
Related Products under HTS 7002.39.00
Quartz Glass Tubing for Fiber Optics
High-purity fused quartz glass tubes supplied unworked for manufacturing fiber optic cables and components. Classified in HTS 7002.39.00 as unworked tubes, including fused silica per chapter notes, prior to any drawing or fabrication. Ideal for high-temperature and optical applications.
Borosilicate Capillary Glass Tubes
Precision unworked borosilicate glass tubes with very small inner diameters for medical and analytical capillary applications. Falls under HTS 7002.39.00 as other unworked tubes, before any sealing or calibration. Used in blood analyzers, chromatography, and micro-fluidics.
Pyrex Glass Tubing for Industrial Thermowells
Pyrex-brand borosilicate unworked glass tubes for fabricating protective thermowells in industrial sensors. HTS 7002.39.00 for other unworked tubes, resistant to thermal shock for harsh environments. Used in chemical plants and refineries.
High-Purity Silica Glass Tubes for UV Lamps
Unworked high-purity synthetic silica glass tubes transmitting UV light for germicidal lamps and curing systems. HTS 7002.39.00 covers these fused silica tubes before quartz working. Essential for water purification and sterilization equipment.
Square Borosilicate Glass Tubing
Unworked square-profile borosilicate glass tubes for architectural models and specialty furniture. Classified HTS 7002.39.00 as other unworked tube shapes beyond round. Provides structural glass elements without fabrication.
Thin-Wall Borosilicate Glass Tubing for Vaporizers
Ultra-thin wall unworked borosilicate tubes for high-end electronic cigarette tanks and vaporizer chambers. HTS 7002.39.00 for other precision tubes before tank assembly. Heat-resistant for vaping applications.