Feature:1. High Durability: Made of thermoplastic polyurethane elastomer(PU), this bow roller is designed for durability and reliability, not susceptible to aging and cracking.2. Powerful Function: This practical roller will not rust or mark your boat, providing protection and cushioning to the hull when secured against bow stop brackets.3. Shock Absorbing Design: Supports the weight of your boat on the trailer, absorbs road shock, and prevents scraping against bolts or roller bracket.4. For Boat Centering: The bow bell assemblies prevents bow to bowstand contact, helping to center the boat and improve stability during transport, providing enough convenience.5. Versatile Usage: Suitable for trailers, boats, and yachts with a 4 inch bow roller with 1/2 inch shaft, the 7.25 inch full length roller provide you with a reliable use.Specification:Item Type: Boat Trailer Roller Center Bow Size: 4in Shaft Size: 1/2inTotal Length: 7.25inApplication: For Boat, Trailer, Yachts.Package List:1 x Trailer Roller