Penta Prism from Mexico
A penta prism made of N-BK7 glass that deviates an incident beam by exactly 90 degrees regardless of prism orientation, used in viewfinders and precision alignment systems. Falls under HTS 9001.90.50.00 as an unmounted optical prism with roof surfaces for maintaining image orientation. Critical component maintaining constant deviation angle in surveying instruments.
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
• Document roof angle precision (typically 90° ± 3 arc seconds) to establish optical quality classification
• Include AR coating specifications if pre-coated, noting that unmounted status refers to mechanical mounting
• Avoid bulk packaging that risks roof edge damage; use individual protective containers