Fused Silica Capillary Tubes from Mexico
Thin-walled, unworked capillary tubes of fused silica used primarily in gas chromatography and analytical instruments. These tubes maintain optical clarity and purity essential for precise measurements. HTS 7002.31.00.00 covers them as unworked tubes of fused quartz or other fused silica.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include dimensional specs and SiO2 purity certificates; capillaries under 1mm ID often scrutinized for microsphere confusion
• Declare as unworked even if coiled for shipping—uncoiling doesn't constitute working per chapter notes