Boat Bow Trailer Roller Assembley 4 inch Reduce Drag High Performance Bow Roller Black.Inner roller is 4inch wide, the inner diameter of mounting hole is about 1.3cm/0.5inch. Fits 4 inch wide center roller bracket. Overall width about 18cm/7.09inchThe boat trailer bow roller is made of nylon material, which is sturdy and wear resistant. It's lightweight yet has a strong load bearing capacity, making it reliable for long term useThe Boat Trailer Roller ensures the boat run smoothly on the trailer, and can help you cushion and protect your boat, yacht trailer accessoriesThe boat trailer roller is easy to install and use, you can easily tow your boat, improving work efficiency while saving energy and timeThis boat trailer bow roller marine boat tug roller is widely used for transporting large cargo in factories, docks, ports, warehouses and other production areas. suitable for boats, trailers, ships, yachtsBoat Trailer Roller Marine Drag Reduction 4inch. Marine Roller Stopping Boat Trailer Roller. RV Boat Trailer for 4 Inch Boat Trailer Bracket. Factories Docks Ports Warehouses Production Areas. Boat Bow Trailer Roller Assembley with End Bells. [Material]The boat trailer bow roller is made of nylon material, which is sturdy and wear resistant. It's lightweight yet has a strong load bearing capacity, making it reliable for long term use [Easy to Install]The boat trailer roller is easy to install and use, you can easily tow your boat, improving work efficiency while saving energy and time [Smooth & Noiseless Rolling]The Boat Trailer Roller ensures the boat run smoothly on the trailer, and can help you cushion and protect your boat, yacht trailer accessories [Size]Inner roller is 4inch wide, the inner diameter of mounting hole is about 1.3cm/0.5inch. Fits 4 inch wide center roller bracket. Overall width about 18cm/7.09inch [Wide Application]This boat trailer bow roller marine boat tug roller is widely used for transporting large cargo in factories, docks, ports, warehouses and other production areas. suitable for boats, trailers, ships, yachts