Brush

FIG. 1 is a perspective view of a brush showing my new design; FIG. 2 is a front elevation view of FIG. 1 ; FIG. 3 is a rear elevation view of FIG. 1 ; FIG. 4 is a left side elevation view of FIG. 1 ; FIG. 5 is a right side elevation view of FIG. 1 ; FIG. 6 is a top plan view of FIG. 1 ; and, FIG. 7 is a bottom plan view of FIG. 1 . The stippling in the drawings indicates a metallic surface material on portions of the brush. The broken lines in the drawings depict portions of the brush that form no part of the claimed design.