Piston

Description

FIG. 1 is a top perspective view of the new design for a piston;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof, with the back view being a mirror image thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a top view thereof.

Claims

The ornamental design for a piston, as shown and described.