Step 1 ·
Section
VII
Plastics and articles thereof; rubber and articles …
Is the product made of plastic, or is it made of rubber?
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Step 2 ·
Chapter
39
Plastics and articles thereof
1 of 2 chapters in section VII
What kind of plastic product is it: an unworked polymer or ion exchanger, plastic waste, a monofilament, rod or profile, a pipe or hose, a floor or wall covering, a flat plastic form, a sanitary item, a transport or packaging item, a household or toilet item, building equipment, or another plastic article?
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Step 4 ·
Subheading
3911 90
Polysulphides, polysulphones and other polymers and…
3 of 3 subheadings under heading 3911
Is it the specifically named poly[oxy-1,4-phenylensulphonyl-1,4-phenylenoxy-1,4-phenylenisopropyliden-1,4-phenylen], poly[thio-1,4-phenylen], specified condensation or intermolecular rearrangement product, specified solution polymer, or another chemically synthesized polymer or prepolymer in unprocessed form?
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