The Sur-Moor taper shape design places more floatation area at the waterline creating a higher visibility mooring. The hard-skin polyethylene shell is UV protected to resist the effects of sunlight and is foam filled to positively displace water. The shell has a sandblasted finish which allows the buoy to be easily painted for identifying. Available in the Tube-Through-The-Center design with blue reflective striping. Please note that hardware not included...call for more information on available hardware options. 3" Tube Dia. and 30" Buoy Dia. with 410 lbs buoyancy .