China HS 4003.0000 (再生橡胶，初级形状或板、片、): US HTS candidates & duty rates

There is no one-to-one mapping: only the first six digits (HS6 400300) are shared internationally. Under this anchor the US schedule has 1 candidate line; the most common is 4003.00.00.00. Match your product facts (material, use, construction) against the descriptions to pick the right one.

Using the leading candidate 4003.00.00.00, the total rate from China is about 25% — MFN base plus the Chapter 99 overlays (Section 301 / IEEPA / reciprocal) active for China origin. Other candidates may differ, so verify classification first.

The WCO Harmonized System is only agreed to six digits. China extends HS6 to 8/10-digit national lines for its own tariffs and statistics, and the US does the same with HTS8/HTS10 — the extensions are independent, so codes must be bridged via HS6.

Compare the US line descriptions against your product facts, check CBP rulings for similar goods, and when in doubt request a binding ruling. The bridge tool lets you re-run this query and compare all candidates side by side.