The Multinautic(TM) small "D" shape dock bumper prevents damage to boats during docking. It is made of premium quality PVC and has been specially formulated for flexibility and boat impact. It is easy to clean, UV resistant, anti-fungus treated, salt water proof and non-marking. This bumper is white, 3" high x 1" deep and comes in 16' rolls. It is covered by a 1-year warranty against manufacturing defects.