I claim the ornamental design for the folding door with mini slats and castors, as shown and described.
FIG. 1 is a front elevational view of the folding door with mini slats and castors. The rear view of the folding door shown in FIG. 1 being a mirror image of the front view.
FIG. 2 is a bottom view of the folding door shown in FIG. 1.
FIG. 3 is a top view of the folding door shown in FIG. 1.
FIG. 4 is a left side view of the folding door shown in FIG. 1; and,
FIG. 5 is a right side view of the folding door shown in FIG. 1.
The broken lines showing an end panel is for illustrative purposes only and form no part of the claimed design.
The broken away sections illustrate indefinite length and width of the claimed design.