Heat Sink

FIG. 1 is a rear, left and top perspective view of a heat sink showing my our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

The broken lines in the drawings illustrate portions of the heat sink that form no part of the claimed design.