Hard skin mooring buoys have a seamless and tough one-piece polyethylene shell Hard skin shells feature ultraviolet light absorbers for long-term life under the sun, and have a sandblasted finish which allows the buoy to be easily painted for identifying Filled with EPS foam to positively displace water Tube-through-the-center design with blue reflective striping 2-1/2 inch tube diameter, 57 inch circumference, 100 lbs buoyancy Three year flotation warranty Molded from tough UV protected polyethylene One piece seamless construction; Tube Diameter:2.5 Inches; Buoy Diameter:18 Inches; Circumference:57 Inches Sandblasted finish allows the buoy to be easily painted for identifying Three year flotation warranty Molded from tough UV protected polyethylene One piece seamless construction; Tube Diameter:2.5 Inches; Buoy Diameter:18 Inches; Circumference:57 Inches Sandblasted finish allows the buoy to be easily painted for identifying Three year flotation warranty 100 lbs buoyancy