Check the listing for details. 4PCS Boat Trailer Roller Marine Inflatable Boat Ribbed Wobble Roller Plastic. Condition: New. Listed at 35.99 USD. Specification:Item Type: Ribbed Wobble RollerMaterial: PPOD: Approx. 110mm/4.3inHeight: Approx. 75mm/3.0inID: Approx. 19mm/0.7inApplication: Boats, marines, yachts, trailer Feature:1. Wide Application: Ribbed wobble roller is a universal accessories, applicable to various situations, such as boats, marines, yachts, trailer and much more to better meet your needs.2. Excellent Function: The ribbed wobble roller is especially designed to help you in loading your boat onto your trailer while not scratching or damaging your boat, highly practical.3. Durable Construction: Boat ribbed wobble roller is made from superior PP material, sturdy and durable, high temperature resistant, not easy to break, long lasting to use.4. Great Replacement: Wobble roller after elaborate manufacturing technology, delivering high reliability and stable performance, direct replacement for the old or broken one. Package List:4 xTrailer RollerSpecification:Item Type: Ribbed Wobble RollerMaterial: PPOD: Approx. 110mm/4.3inHeight: Approx. 75mm/3.0inID: Approx. 19mm/0.7inApplication: Boats, marines, yachts, trailer Feature:1. Wide Application: Ribbed wobble roller is a universal accessories, applicable to various situations, such as boats, marines, yachts, trailer and much more to better meet your needs.2. Excellent Function: The ribbed wobble roller is especially designed to help you in loading your boat onto your trailer while not scratching or damaging your boat, highly practical.3. Durable Construction: Boat ribbed wobble roller is made from superior PP material, sturdy and durable, high temperature resistant, not easy to break, long lasting to use.4. Great Replacement: Wobble roller after elaborate manufacturing technology, delivering high reliability and stable performance, direct replacement for the old or broken one. Package List:4 xTrailer Roller