9033.00
Parts and accessories (not specified or included elsewhere in this chapter) for machines, appliances, instruments or apparatus of chapter 90:
Duty rates
“General” applies to imports from most trading partners under normal trade relations. “Special” lists products eligible for reduced or duty-free treatment under programs like GSP, USMCA, CAFTA-DR, or individual free-trade agreements. “Column 2” applies to imports from countries without normal trade relations (currently Cuba and North Korea).
Chapter 90
Optical, photographic, cinematographic, measuring, checking, precision, medical instruments (Section XVIII — Precision instruments, clocks, musical instruments)