Roxom 8″ Self Centering Keel Roller - 21mm Bore

8" Self Centering Boat Trailer Keel Roller with 21mm Bore. Boat Roller Size: 200mm Long X 70mm Dia X 21mm Bore Made from HDPE Polyethylene, Machined from a solid piece of material these rollers are built to stand the toughest of conditions and still maintain there reliability. These plastic rollers will not split or crack unlike rubber rollers. These rollers are ideal for use with Aluminium boats & trailers. 8 inch self centering keel rollers are ideal for medium to larger sized boats. Perfect to help centre your boat back on the trailer with ease.