Keel roller self-centering 8 inch black rubber - 17mm centre

8-inch keel roller self-centering. The UV stable black rubber is a universal type roller that is used on both alloy and fiberglass boats. 

Self-centering rollers help in centering your boat on the trailer. It does this automatically while the boat rolls forward. This is through the help of the embedded grooves. Self-centering rollers make loading the boat easier. 

Pin size = 17mm