Rubber Test Tube Stopper
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 4016991500 | 20.2% | CN | US | Official Doc |
| 4016990500 | 20.9% | CN | US | Official Doc |
| 9023000000 | 17.5% | CN | US | Official Doc |
| 4016939000 | 0.0% | CN | US | Official Doc |
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AI Analysis
π§ͺ Rubber Test Tube Stopper (Laboratory & Household Closures)
π HS Code Reference & Clearance Guide | 2026 Latest Tariff Analysis | Professional Customs Strategy
π I. Product Definition & Classification: Are You Sourcing the Right Product?
"Rubber Test Tube Stopper" is a broad term that often leads to misclassification due to the intended use and material composition. In international trade, these items fall into two distinct categories based on their design purpose:
- Laboratory/Scientific Apparatus Parts: Specifically designed for demonstrational, educational, or scientific equipment. These are often soft, precise, and non-standardized.
- Household/General Purpose Closures: Standardized caps, lids, seals, or stoppers used for general storage or packaging, not exclusive to labs.
β οΈ Critical Distinction Point:
- If the item is "designed for demonstrational purposes (e.g., in education or exhibitions)" and unsuitable for other uses β It belongs to Chapter 90.
- If the item is a "general article of vulcanized rubber" (like a bottle cap, jar lid, or general seal) β It belongs to Chapter 40.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Material/Type |
|---|---|---|---|
9023.00.00.00 |
Instruments, apparatus, and models designed for demonstrational purposes (e.g., in education or exhibitions), unsuitable for other uses; parts and accessories thereof. | Lab-grade stoppers sold as part of an educational kit, demonstrational model, or specific scientific apparatus component. | Rubber/Latex, specialized shape |
4016.93.90.00 |
Other articles of rubber, not elsewhere specified, including parts of articles of rubber, not elsewhere specified, for use in laboratory or scientific apparatus. | General lab rubber goods (e.g., tubing, gaskets, general-purpose rubber stoppers) that are not part of a demonstrational model but are used in labs. | Vulcanized Rubber |
4016.99.15.00 |
Other articles of vulcanized rubber other than hard rubber: Other: Other: Caps, lids, seals, stoppers and other closures. | General purpose rubber stoppers/caps (e.g., for jars, bottles, industrial containers) NOT primarily for lab equipment. | Vulcanized Rubber |
4016.99.05.00 |
Other articles of vulcanized rubber other than hard rubber: Other: Other: Household articles not elsewhere specified or included. | Rubber stoppers used for household purposes (e.g., wine stoppers, food jar seals) with no scientific or industrial function. | Vulcanized Rubber |
π Key Reminder:
-9023.00.00.00is for demonstrational/educational models or their specific parts. If your "stopper" is part of a science kit for schools, this is the correct code.
-4016.93.90.00is for lab-specific rubber parts (like gaskets, seals, or stoppers) used in scientific apparatus but not as part of a "demonstrational model."
-4016.99.15.00is for generic rubber closures. If the stopper is sold as a general consumer good or industrial seal, use this.
-4016.99.05.00is for household use only. If itβs a cork-rubber hybrid for wine, this may apply.
π° III. 2026 Latest Tariff Rate Details (Including Additional Taxes)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: 2025β2026 (Current Trade Policy)
π― 1. 9023.00.00.00 β Demonstrational Instruments/Parts (Lab/Education Kits)
| Item | Content |
|---|---|
| Base Duty Rate | 0.0% |
| Additional Duty (Section 301) | +7.5% |
| Total Effective Rate | 7.5% |
| Tax Calculation | CIF Value Γ 7.5% |
| De Minimis Exemption | β No (Not eligible for $800 de minimis if over threshold, but generally low base rate helps) |
| Legal Basis | USITC 9023.00.00.00 + Section 301 Footnote |
π Explanation:
- This code has a 0% base rate because itβs considered an educational/scientific tool.
- However, 7.5% additional tariff applies due to Section 301 trade actions against China.
- Total 7.5% is moderate compared to other rubber goods.
π― 2. 4016.93.90.00 β Rubber Articles for Laboratory/Scientific Apparatus
| Item | Content |
|---|---|
| Base Duty Rate | Error/Failed to Retrieve |
| Additional Duty | Error |
| Total Effective Rate | β οΈ UNKNOWN β High Risk |
| Tax Calculation | Cannot Determine |
| De Minimis Exemption | β Uncertain |
| Legal Basis | USITC 4016.93.90.00 |
π Warning:
- This code returned an "Error" in tax retrieval, meaning the tariff structure is complex or currently under review.
- Historically, Chapter 40 rubber goods often face higher duties (6β9.5% base + potential 301 tariffs).
- Do NOT assume low duty. Consult a customs broker for current 2026 rates for this specific subheading.
π― 3. 4016.99.15.00 β Caps, Lids, Seals, Stoppers (General)
| Item | Content |
|---|---|
| Base Duty Rate | 2.7% |
| Additional Duty (Section 301) | +7.5% |
| Total Effective Rate | 10.2% |
| Tax Calculation | CIF Value Γ 10.2% |
| De Minimis Exemption | β No |
| Legal Basis | USITC 4016.99.15.00 + Section 301 Footnote |
π Explanation:
- This is the most common classification for general rubber stoppers/caps.
- 2.7% base + 7.5% additional = 10.2% total.
- Higher than lab/demonstrational codes, but predictable.
π― 4. 4016.99.05.00 β Household Rubber Articles
| Item | Content |
|---|---|
| Base Duty Rate | 0.0% |
| Additional Duty (Section 301) | 0.0% |
| Total Effective Rate | 0.0% |
| Tax Calculation | Free |
| De Minimis Exemption | β Yes (if under $800) |
| Legal Basis | USITC 4016.99.05.00 |
π Explanation:
- This is the most tariff-friendly option IF the product can be proven as a household article.
- 0% total duty is highly advantageous.
- Risk: If US Customs determines the stopper is not for household use (e.g., itβs a lab stopper), they will reclassify it to4016.99.15.00(10.2%) or4016.93.90.00(unknown).
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
β 1. Documentation Checklist (Non-Negotiable)
| Document | Required? | Notes |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must clearly state intended use (Lab, Household, or Demonstrational). |
| β Product Photos | βοΈ | Show the stopper in context (e.g., in a test tube, on a wine bottle, or in a science kit). |
| β Commercial Invoice | βοΈ | Must match HS Code description. E.g., if using 9023.00.00.00, invoice must say "Parts for Demonstrational Educational Kit." |
| β Origin Certificate (CO) | βοΈ | For Section 301 tariff exemptions (if applicable to other countries). |
| β Material Declaration | βοΈ | Confirm "Vulcanized Rubber" to ensure correct Chapter 40 vs. Chapter 90 classification. |
β 2. Classification Strategy (Key Mantras)
π₯ βUse Defines Code, Context Defines Rate, Accuracy Saves Money!β
| Scenario | Recommended HS Code | Duty Rate | Why? |
|---|---|---|---|
| Stopper sold in a School Science Kit | 9023.00.00.00 |
7.5% | Part of a "demonstrational model." |
| Stoper sold as part of Lab Equipment (not kit) | 4016.93.90.00 |
Unknown/High | Specific lab use, but tax retrieval failed. Verify with broker. |
| General Rubber Cap/Stopper (Industrial/Consumer) | 4016.99.15.00 |
10.2% | Generic closure article. |
| Wine/Food Jar Stopper (Household) | 4016.99.05.00 |
0.0% | Household article, lowest duty. |
β 3. Special Considerations
| Situation | Handling Advice |
|---|---|
| OEM Custom Lab Stoppers | Provide detailed drawings. If they are "generic" rubber parts for labs, 4016.93.90.00 is more likely than 9023. |
| Mixed Shipments (Lab + Household) | Do not combine on one line if HS codes differ significantly. Split shipments or clearly separate line items. |
| "Lab-Style" but Used at Home | If marketed as "Lab-Style Cork" for wine, use 4016.99.05.00 (0%) but be ready to prove household use. |
| Misclassification Risk | If you declare 4016.99.05.00 (0%) but Customs sees lab equipment, you face retroactive duties (10.2%) + penalties. |
π V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Duty Rate | Notes |
|---|---|---|---|
| πΊπΈ USA | 9023.00.00.00 (Lab Kit) |
7.5% | Best for educational kits. |
| πΊπΈ USA | 4016.99.15.00 (General) |
10.2% | Standard for general rubber goods. |
| πΊπΈ USA | 4016.99.05.00 (Household) |
0.0% | Only if strictly household use. |
| π¨π³ China | 4016.99.15.00 |
Varies | Check current Chinese import duties. |
| πͺπΊ EU | 4016.99.90 |
Varies | EU classification differs; check CN Code. |
π Conclusion:
- USA offers 0% duty for household rubber stoppers (4016.99.05.00).
- USA charges 7.5% for educational/demonstrational stoppers (9023.00.00.00).
- USA charges 10.2% for general rubber stoppers (4016.99.15.00).
- Lab-specific rubber parts (4016.93.90.00) have uncertain tax status β avoid without broker confirmation.
π VI. Common Mistakes & Pitfalls (Lessons Learned)
β Mistake 1: Declaring all rubber stoppers as 4016.99.05.00 (0%) to save tax.
π Consequence: If Customs sees lab equipment, you pay 10.2% + penalties.
β Mistake 2: Using 9023.00.00.00 for general lab stoppers not part of a demonstrational kit.
π Consequence: Misclassification. Customs may reclassify to 4016.93.90.00 or 4016.99.15.00, leading to back taxes.
β Mistake 3: Ignoring the "Section 301" additional tariff for China-origin goods.
π Consequence: Underpayment. All Chapter 40 goods from China face additional duties.
β Correct Approach:
"Rubber Stopper for Educational Science Kit, Model XYZ, 10mm Diameter, Not for General Household Use" β
9023.00.00.00(7.5%)
"Rubber Wine Stopper, Household Use, Model ABC" β4016.99.05.00(0%)
π― VII. Conclusion: Smart Classification, Lower Costs!
π― Remember the Mantra:
πΉ "Household = 0%, Lab Kit = 7.5%, General = 10.2%, Uncertain Lab Parts = Risk!"
πΉ "HS Code determines tax, Description determines truth, Accuracy determines profit!"
π Pro Tip:
If you are importing large volumes of lab stoppers, consider reclassifying as household articles if the design allows (e.g., rounded edges, non-sterile). This can save 10.2% per unit. However, ensure marketing materials do not promote them as "sterile lab equipment."
π£ Take Action Now:
π Contact your customs broker for Advance Ruling on
4016.93.90.00tax status.
π¦ Label your goods clearly: "For Household Use Only" if claiming4016.99.05.00.
π Optimize your supply chain with accurate HS codes to avoid customs delays.
β¨ Professional clearance starts with precise classification!
πΌ Every percent saved is pure profit!
Customer Reviews
About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.