Belly— the thick midsection of the tuft made from conic shaped, pointed natural hair.
Butt— Root end of a hair. Also, a hair that is upside down.
Conic— the shape usually referring to a round ferrule that is cone-shaped. These are typically used for making round brushes.
Cylindrical— the shape usually referring to a ferrule that is uniform in shape. These are used to make flats, brights, and filberts.
Flag— natural split ends of a Hog bristle.
Snap— the degree of resiliency of a brush, as evidenced by the snapping noise made by the tuft when bent firmly to the side and then suddenly released.
Tapered— describes bundles of hair containing hairs of two or more different lengths.
Tuft— the bristle section of the brush.
