13-Inch, Heavy Duty Round Plant Planter Stand Caddy Caddie Dolly (White) (MGT 10004W) External Diameter: 13" ; Internal Diameter: 11". Color: White. With 4 wheels. This Down under caddy holds up to 180 pounds. Constructed of UV resistant plastic. Use indoor or outdoor. Solid casters. One locking caster keeps caddy in place. Easily move your potted plants and change your garden design. Provides plants with optimal lighting throughout the day by wheeling them into/out of the sunlight.