Supplier development
Tandom’s paid supplier-development service helps industrial buyers identify and evaluate alternative manufacturers, compare quotes, qualify samples, and prepare a first order. Buyers retain supplier approval and all customs and compliance decisions.
Exporting to the United States
Tandom’s Americas Desk works with manufacturers outside the United States on the commercial side of entering it: buyer research, targeted outreach, qualifying the opportunities that come back, quote support, and follow-up.
Tandom · Duty calculator
Add country, entered value, and entry date to estimate the base rate, potentially applicable Chapter 99 duties, and customs fees. AD/CVD scope requires a separate review.
HTS 0508.00.00.00 is the U.S. Harmonized Tariff Schedule classification for Coral and similar materials, unworked or simply prepared but not otherwise worked; shells of molluscs, crustaceans or echinoderms and cuttlebone, unworked or simply prepared but not cut to shape, powder and waste thereof. It's a 10-digit statistical line in Chapter 05: Products of animal origin, not elsewhere specified, Section I: Live Animals; Animal Products, used by U.S. Customs and Border Protection to determine the duty rate at entry. No Chapter 99 flags or potentially relevant AD/CVD order flags are linked to this code in Tandom's current catalog view.
New to HTS codes? Read our guide on how HTS classification works →
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification of Paper Shell Foraminifera from the Republic of Fiji
The tariff classification of Puka Shells from Philippines
Classification of two lots of miscellaneous decorative articles from Thailand.
The tariff classification of Pearl Powder from China
The tariff classification of a wooden picture frame with seashells, from India.
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 0508.00.00.00 is the U.S. Harmonized Tariff Schedule classification for Coral and similar materials, unworked or simply prepared but not otherwise worked; shells of molluscs, crustaceans or echinoderms and cuttlebone, unworked or simply prepared but not cut to shape, powder and waste thereof. It belongs to Chapter 05 of the HTSUS.
The general (Column 1) duty rate for HTS 0508.00.00.00 is Free. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
No Chapter 99 flags are linked to HTS 0508.00.00.00 in Tandom's current catalog view. Use the calculator's date, origin, and product inputs to check a specific entry scenario.
Tandom's current catalog view links no potentially relevant AD/CVD order flags to HTS 0508.00.00.00. Check current Commerce scope materials and Federal Register notices before relying on an HTS-only screen.
Tandom guides relevant to this code
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
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How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
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Why raw LLM prompts fabricate stat suffixes, why MCP-augmented prompts do not, and the prompt template a broker can hand to Claude or ChatGPT today.
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What changed for low-value DTC and ecommerce shipments after Section 321 de minimis was suspended in 2025. Filing, fees, and duty math through 2027.
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Turn a PDF commercial invoice into ACE-ready entry data. Which fields to extract, how to chain extraction into HTS classification and duty calculation.
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