Feature: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 RollerMaterial: PVCCenter Inner Diameter: Approx. 14mm/0.6in (require a bolt, NOT included)Application: Boats, marines, yachts, trailer, etc..Package List:1 xBow Roller (3PCS Parts in Total)