Features： 1、Wide Usages: Marine bow shape roller is a universal accessory, applicable to various situations, such as boats, marines, yachts, trailer and much more to better meet your needs. 2、Powerful Function: The marine shape roller allows the boat to roll smoothly on the trailer, not affected by oil, gas or salt, and free spins when launching to reduce drag. 3、3 Pieces Design: The bow stop roller takes full advantages of 3 pieces design, which can minimize friction and drag to ease in launching, convenient for using. 4、Excellent Performance: Boat bow roller after sophisticated manufacturing process for smooth surface without burrs, will not mark up the hull with ugly black streaks. 5、Reliable Materials: The boat trailer roller is carefully made from preferred PVC materials, flexible and moulded, not easy to damage, has a long service life. Specification： Item Type: Bow Roller Material: PVC Center Inner Diameter: Approx. 14mm/0.6in (require a bolt, NOT included) Application: Boats, marines, yachts, trailer, etc. Package List： 1 x Bow Roller (3PCS Parts in Total)