A great value and design! This rugged one-piece float is rotationally molded for extra strength. These rotationally molded floats are seamless and thicker than blow molded floats which results in much stronger and thicker corners and edges where strength matters most. Unaffected by weather. 10 mounting points provide easy attachment to the stringers. Multi-directional troughs on top also add strength and make it easy to feed through water and electrical lines. 400 foam filled floats will not sink if dock is accidentally punctured. Backed by a 10-year warranty against defects. 400 lb. flotation capacity. 24" x 48" x 12".