Section XVIII · Optical, photographic, measuring, medical or surgical instruments

9020.00

Other breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filters; parts and accessories thereof:

How this code is built
90

Chapter

Optical, photographic, measuring, medical or surgical instruments

20

Heading

The product family within the chapter

00

Subheading

The specific good, identical worldwide

The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.

How the schedule reaches this code

  1. 90Optical, photographic, measuring, medical or surgical instruments
  2. 9020Other breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filters; parts and accessories thereof:

Published US duty rates

Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.

  • 9020.00.40.00Underwater breathing devices designed as a complete unit to be carried on the person and not requiring attendantsNo.
    General
    Free
    Special (FTA)
    —

    No preferential rate published.

    Column 2
    27.5%

    Countries without normal trade relations.

  • 9020.00.60.00Other breathing appliances and gas masksNo.
    General
    2.5%
    Special (FTA)
    Free (A,AU,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)

    Only if the goods qualify under one of these programs.

    Column 2
    35%

    Countries without normal trade relations.

  • 9020.00.90.00Otherkg
    General
    2.5%
    Special (FTA)
    Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)

    Only if the goods qualify under one of these programs.

    Column 2
    35%

    Countries without normal trade relations.

This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.

Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 12, released 2026-07-21, published at hts.usitc.gov. A U.S. Government work in the public domain.