FIG. 1 is a perspective view of a packing box;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof; and
FIG. 6 is a top view thereof, the opposite side being a mirror image of the side shown herein; and,
FIG. 7 is an enlarged detail view of the lower side of FIG. 2.
The portion shown by broken lines is for illustrative purposes only and forms no part of the claimed design.