8443.91
Parts and accessories of printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442:
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 84
Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof (Section XVI — Machinery and mechanical appliances)