Easy to open snap frame includes the anti-reflex cover as suitable for external use, equipped with water wick. Can be used as double sided. Steel springs provide flexibility to keep it stable. The wheels help movement of the unit. Wheel, on ground in upside position help easy move of the product. Suitable for rainy & windy conditions, protects the poster within. Round corner serve for the safety on pavement use. Each base comes with industrial salt to prevent freezing in winter conditions. Each product comes unassembled with easy instruction sheet & fixing set. Heavy base provide stability. Base standard metalic gray color.