The center tubes are made solid with metal screws. This highly strengthens the stand to support heavier items on top. It will not wiggle or topple. This highly durable crystal clear cupcake stand has been fashioned using clear acrylic plates supported by sturdy center tubes, that are made solid with metal screwsto give high strength to the stand for supporting heavier items. For attaining the best standards of quality, the edges of the acrylic are perfectly clear and polished. Every part of the stand has been accurately cut and finished to provide you only the very best for your Big Event! For busy parties and outdoor events, this cupcake stand is highly suitable, strong breeze or accidental bumping will not wiggle or topple the stand due to heavy duty metal screwed solid center tubes. Additional Information: Material: High Grade Acrylic Space between each Tier: 4" Plate Thickness: 4mm Tube Diameter: 1.25" No. of Tubes: 3 Total Height: 12.5" Set contains: 1 x 6" Top Plate 1 x 8" Second Plate 1x 10" Third Plate 1 x 12" Bottom Plate Bottom plate has 4 Rubber legs attached so it does not move by accident