Pyrex Glass Tubing for Industrial Thermowells from Mexico
Pyrex-brand borosilicate unworked glass tubes for fabricating protective thermowells in industrial sensors. HTS 7002.39.00 for other unworked tubes, resistant to thermal shock for harsh environments. Used in chemical plants and refineries.
Duty Rate — Mexico → United States
16%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Trademark Pyrex requires origin verification; generic borosilicate needs composition docs
• Specify pressure/temperature ratings in commercial invoices for accurate valuation
• Avoid pre-threading or metal insertion, which creates instrument parts under 9026