FIG. 1 is a front perspective view of a product display unit;
FIG. 2 is a side perspective view of the product display unit;
FIG. 3 is a front view of the product display unit;
FIG. 4 is a rear view of the product display unit;
FIG. 5 is a right side view of the product display unit;
FIG. 6 is a left side view of the product display unit;
FIG. 7 is a top view of the product display unit; and,
FIG. 8 is a bottom view of the product display unit.
Any broken lines of the FIGURES are illustrative and depict environment; therefore, they form no part of the claimed design. Additionally, in some embodiments, any non-oblique line shading is meant to show contour of represented surfaces, not surface ornamentation.