US D460624 S1
FIG. 1 is a perspective view of of my ornamental design for a toothbrush head with stepped bristle array thereof;
FIG. 2 is a front view of the design thereof;
FIG. 3 is a rear view of the design thereof;
FIG. 4 is a plan, bottom view of the design thereof;
FIG. 5 is a plan, top view of the design thereof; and,
FIG. 6 is a side view of the design thereof.
The broken line showing of environmental structure in FIGS. 1-3, 5 and 6 is for illustrative purposes only and forms no part of the claimed design.