The ornamental design for a handle for brush, as shown and described.
FIG. 1 is a perspective top view of a handle for brush, embodying our new design;
FIG. 2 is a perspective bottom view of a handle for brush of FIG. 1;
FIG. 3 is a top view of a handle for brush of FIG. 1;
FIG. 4 is a right side view of a handle for brush of FIG. 1;
FIG. 5 is a bottom view of a handle for brush of FIG. 1;
FIG. 6 is a front view of a handle for brush of FIG. 1; and,
FIG. 7 is a back view of a handle for brush of FIG. 1.
The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. The left side view of the handle is the mirror image of the right side view.