Product display unit

FIG. 1 is a bottom front perspective view of a product display unit showing the claimed design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view of the product display unit in an environment in which it may be used.

The dashed broken lines in the figures show portions of the product display unit and environment that form no part of the claimed design.