Feature 1Function: The ribbed wobble grey roller is designed to help you in loading your boat onto your trailer without scratching or damaging your boat. 2Dimensions: Outer diameter of ribbed wobble roller is 5in/12.7cm, height is 3in/7.62cm and the installation inner diameter is about 30mm/1.18in. 3Universal Fitment: Ribbed wobble roller has wide range of applications, suitable for boats, marines, yachts, trailer and so on, practical accessory. 4Durable Material: Wobble roller is made of premium ABS and rubber material, sturdy and durable, high temperature resistant, not easy to break. 5Ideal Replacement: Elaborate manufacturing technology, has high reliability and stable performance, direct replacement for the old or broken one.Item Type:WobbleRollerMaterial: ABS + RubberOuter Diameter: Approx. 5in/12.7cmHeight: Approx. 3in/7.62cmInstallation Inner Diameter: Approx. 30mm/1.18inApplication: Boats, Yachts, Trailers .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x WobbleRoller