A result of trickle-down from Grand Prix yacht racing Ronstan's range of Low Friction Rings provide an outstanding strength to weight solution where the absolute minimum friction of a ball bearing block is not required. That being said, the performance difference between well and poorly executed versions of these simple products is marked. The basic appearance of the Ronstan Low Friction Ring range belies an exacting development process that investigated, tested and delivered optimised performance in strength, weight, friction, line wear and security. Ronstan Low Friction Rings are machined from high grade aluminium with a durable low friction anodised coating and are available in three sizes to suit lines up to 14mm (9/16").