FIG. 1 is a side perspective view of bristles of a brush showing my new design;

FIG. 2 is a left side elevation view of the design shown in FIG. 1;

FIG. 3 is a right side elevation view of the design shown in FIG. 1;

FIG. 4 is a top plan view of the design shown in FIG. 1; and,

FIG. 5 is a bottom plan view of the design shown in FIG. 1.

The broken lines in the drawings illustrate environmental structural and form no part of the claimed design.