This 12 inch self-centering keel is made of the highest quality polyurethane and has been tested and proven to last longer than poor quality polyrollers. Anti U-V formulas prevent rapid discolouration and any discolouration over time is purely visual and has no influence on the ability of the rollers to function and prevent markings, which means that this roller will last longer.
Stoltz Rollers do not mark your boat!