24″ x 36″ Black Banner Pro Sidewalksign This 24″x36″ pavement sign with an excellent spring system connected to the black base, is an ideal and safe marketing tool for sidewalk display. It is strongly stable and doesn’t blow over in windy conditions. Black finish aluminum frame with a sleek and elegant design grab your images tightly. Water base, made of single moulded propylene in a special rotary press, is long-lasting, flexible and durable. Industrial salt inside of each base prevents water from freezing in cold weather. The outdoor display features wheels to make repositioning even easier.