9012

Analysis

Heading 9012 of the Harmonized Tariff Schedule covers microscopes other than optical microscopes; diffraction apparatus; parts and accessories thereof. It divides into 2 six-digit subheadings and 2 eight-digit tariff lines, with 2 ten-digit statistical suffixes below them.

Every one of its 2 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.

The largest subheadings are 9012.10 (unnamed, 1 line) and 9012.90 (unnamed, 1 line).

Its median rate of duty-free sits at the 37th percentile of the headings in chapter 90.

By Census's concordance, most of its statistical lines are made by Analytical Laboratory Instrument Manufacturing (334516). Those are the NAICS industries a US producer of these goods would report under.

The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.