Log Log Duplex Trig Slide Rule from Mexico
Advanced slide rule with log-log scales on both sides for exponential and trigonometric calculations in nuclear physics and rocketry. Under HTS 9017.20.4000 as a high-end mathematical instrument. Magnesium or ivory construction with multiple cursors.
Duty Rate — Mexico → United States
13.9%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Scientific institution letters support classification for research-grade instruments
• Rare materials (ivory substitutes) require CITES-like documentation even for synthetics
• Avoid 'collectible' valuation; functional testing confirms instrument status