The ornamental design for a pallet with columns, as shown and described.
FIG. 1 is a perspective view of a pallet with columns;
FIG. 2 is a front view thereof, the rear view being the same as the front view;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof, the left side view being the same as the right side view;
FIG. 5 is a bottom view thereof;
FIG. 6 is a section view taken in the direction of line 6-6 of FIG. 2; and,
FIG. 7 is a section view taken in the direction of line 7-7 of FIG. 2.
The dash-dash-dash lines shown in the figures are for the purpose of illustrating environmental structure and form no part of the claimed design. The dash-dot-dash lines shown in the figures are for the purpose of illustrating boundaries and form no part of the claimed design.