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7001.00.10.00/Flame-Polished Fused Silica Mass/Japan

Flame-Polished Fused Silica Mass from Japan

Fused silica in mass form with flame-polished surfaces for minimal defects, used in fiber optic preform production. Remains in HTS 7001.00.10.00 as polishing here is pre-annealing process per chapter note.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• ,Measure surface roughness (Ra <0.1um); critical for customs purity verification

• Batch traceability required; link to end-use permits for dual-use tech exports