Both HVLP (high-volume, low-pressure) and conventional pneumatic spray guns fall within this heading, as the classification turns on the appliance's function — projecting liquid by air pressure — rather than its specific operating pressure or atomization technology. The distinction that matters for classification is end-use: agricultural or horticultural sprayers are classified separately, so a spray gun marketed for crop application would be reviewed under a different heading.

Electrostatic spray guns that project liquid coatings are generally captured within this heading. Powder-coating guns that project dry powder rather than liquid may be subject to classification review, as the heading's core language references projecting liquids. Importers of electrostatic powder systems should confirm the correct heading with a licensed customs broker, particularly if the unit combines liquid and powder capability.