4" Red Smooth wobble rollers with 20/22mm bore. These rollers are ideal for fiberglass boats and hulls. These polyurethane rollers will outlast and perform traditional rubber wobble rollers with the expected lifespan much greater. Do not settle for anything less than the best when it comes to dealing with your prized investment!

Bore size = 20/22mm. Diameter = 4 inch. Width = 3.5 inch.