NAICS 33721 is the five-digit industry group that encompasses both wood office furniture (337211) and non-wood office furniture (337214), as well as showcases and partitions (337215). Trade data reported at the six-digit level provides more granular insight into material composition and product type, which is useful for competitive benchmarking and supply-chain analysis.

Yes, office seating including task chairs and ergonomic chairs is captured within the office furniture (except wood) subcategory under NAICS 33721. For HTS import purposes, chairs are classified separately from casegoods and may carry different duty rates and trade remedy exposure.