Toothbrush head

FIG. 1 is a top perspective view of a toothbrush head embodying the new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a right side view, the left side being a mirror image thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The portions shown in broken lines in FIGS. 1 - 3 and 5 - 7 form no part of the claimed design.