Usage Tips:Feature: 1. Wide Application: Ribbed wobble roller is a universal accessories, applicable to various situations, such as boats, 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. Exquisite Workmanship: Ribbed wobble roller is produced with 108x75x19mm size with high accuracy process for perfect fit, blue appearance is pretty and smooth without burrs. 5. Great Replacement: Wobble roller after elaborate manufacturing technology, delivering high reliability and stable performance, direct replacement for the old or broken one. Product Description Specification: Item Type: Ribbed Wobble Roller Material: PP OD: Approx. 108mm/4.3in Height: Approx. 75mm/3.0in ID: Approx. 19mm/0.7in Application: Boats, marines, yachts, trailer, etc. color: blue Package Contents: 4 x Ribbed Wobble Roller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.