US D403666 S
FIG. 1 is a perspective view of the heat sink embodying the new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a front elevational view thereof; and,
FIG. 5 is a right side elevational view thereof, the left side being a mirror image thereof.
The bottom of the heat sink forms no part of the claimed design. The broken line showing of supports in FIGS. 3-5 is for illustrative purposes only and forms no part of the claimed design.