9603.40.40.40 - Natural bristle brushes

This HTS classification covers natural bristle brushes specifically designed for applying paints, distempers, varnishes, or similar coating materials. This includes brushes where the bristles are derived from animal hair, such as hog, badger, or sable. The primary function of these brushes is to facilitate the smooth and even application of liquid or semi-liquid surface treatments.

Distinguished from its sibling categories, this classification **excludes** paint pads (subheading 9603.40.40.20), which are distinct application tools typically made of foam or fabric. It also differs from other "other" paint-related items that may fall under 9603.40.40.60, focusing solely on brushes with natural bristles for painting purposes. The key differentiator here is the material composition of the bristles.

As a leaf node, this classification has no further subcategories. Therefore, classification into 9603.40.40.40 is definitive when an item meets the description of a natural bristle brush intended for painting or varnishing applications and does not fit into more specific product categories like paint pads. Practical considerations for classification would include examining the brush head material to confirm it is indeed natural bristle and assessing its primary intended use in coating applications.