Standard 1/2 Inch Shaft Opening:This 3-inch bow roller has a 1/2-inch central shaft hole. It fits most common boat trailer brackets for direct replacement and quick installation.
Integral Molded Rubber Structure:The roller is made of one-piece molded black rubber with no split seams or glued joints. It stands up to daily wear and saltwater conditions for long-term marine use.
Hourglass Centering Contour:The curved hourglass profile holds the boat centered steadily. It keeps the hull aligned while you winch or launch the boat onto the trailer.
Fits Small Marine Watercraft:Works well as OEM replacement hardware for fishing boats, yachts, dinghies, kayaks and other small vessels with matching trailer mounting structures.
Boat Hull Protection:The soft rubber outer surface prevents scratches, scuffs and paint abrasion on fiberglass and aluminum hulls during loading, launching and transit.