Cylindrical or DO-fenders have a circular inner hole which provides further rigidity in comparison to the standard D-fenders. It is recommended to fix this type of fender directly to the side of the boat through the flat base side only. DO-fenders can be easily installed to floors or walls to protect large surface areas from accidental impact. They are commonly found on boats, quays, warehouses, loading bays and will suit almost any internal or external application. Subject to minimum order quantities, please call a member of our sales team for more information.