I claim the ornamental design for glass panels of a shower door, as shown and described.
FIG. 1 is a front perspective view of glass panels of a shower door according to the present design;
FIG. 2 is a front view of the glass panels of FIG. 1, the rear view of the glass panels being identical to the front view;
FIG. 3 is a right side view of the glass panels of FIG. 1, the left side view of the glass panels being identical to the right view;
FIG. 4 is a bottom view of the glass panels of FIG. 1; and,
FIG. 5 is front perspective view of the glass panels of FIG. 1 with their environment shown in broken lines.
Each glass panel shows an external side edge, which, from top to bottom, follows a concave curvature, followed by a convex curvature, and followed by a concave curvature. The broken lines form no part of the design and are for illustrative purposes only.
The broken lines showing of shower door and environment are included for the purpose of illustrating unclaimed matter and form no part of the claimed design.