Displays2go Outdoor Sidewalk Snap Open Sign Frame, Wheeled Base, 22x28-Inches, Double-Sided, Black (PS1528BLK) Double-sided to maximize advertising from multiple directions. Plastic base can be filled with water or sand for increase stability and springs provide wind resistance. Snap-open frame allows for quick and easy graphic changes. Hidden wheels, built-in under the base, allow this stand to be easily moved from one location to another. Holds two 22x28-inch posters behind lenses