1Versatile Use: This ribbed wobble roller is universally applicable and works in a variety of scenarios. Its uses extend across boats, marines, yachts, trailers and more. 2High Functionality: Wobble roller can assist to load boat onto trailer without scratching or causing damage to boat., and you can easily push ship and can speed up your work efficiency. 3Strong and Enduring: Constructed from premium Polyurethane material, the boat ribbed wobble roller boasts durability and resistance to high temperatures. 4Superior Craftsmanship: The trailer ribbed wobble roller, created with 125 x 73 x 30mm / 4.92 x 2.87 x 1.18in dimensions, allows for a perfect fit. 5Reliable Replacement: Demonstrating high reliability and stable performance owing to meticulous manufacturing processes, this wobble roller serves as a great replacement. 4 x Trailer Rollers