Invincible Marine 3-Inch Super Bow Roller, 3-Piece Made using the highest quality components Performance and quality tested The most trusted name in marine accessories and equipment Combines center roller and end bells for the best guidance and boat protection Made from polyurethane, these shock-absorbing rollers will not mark your boat Will outlast ordinary rubber many times over Unaffected by oil, gas or salt Comes with a 1-year warranty