Flame-Polished Fused Silica Mass from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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