These regulatory buoys represent the most rugged and complete line of navigational buoys in the United States, meeting the stringent requirements of state, municipalities, and private harbors. Feature rotationally molded, high-density polyethylene shells that are UV-stabilized. The rotational molding process allows for uniform wall thickness without the internal stresses that cause cracking over time and under extreme temperature changes. This process imparts tremendous impact strength to the shell. 48" overall height. 24" max. diameter. 235-lb. approximate buoyancy.