• Overall dimensions (with bells): 5-1/4 inch long x 4 inch diameter. Inner roller is 2.98 inch long x 2.8 inch diameter. Attachment bolt is 1/2 inch.
• This boat trailer roller material is polyvinyl chloride PVC.PVC construction is better than rubber and is non-marring,durable,and corrosion resistant.
• Will not rust or will not mark your boat,will not flat spot.
• Designed to support the weight of your boat on the trailer,absorbs road shock.
• End bells ensure that the boat does not scrape against bolts or roller bracket.