Sedan style on road geometry shock towers for the RC18R. Control body roll by using these 2mm quasi weave carbon towers for crisper handling on asphalt and carpet. More effectively tunes the RC18R using Associated RC18R tuning springs for superior on road action. USA made DA Graphite towers includes (2) 6061 alloy ball mounts and alloy steel hex head hardware (uses a .05 hex wrench).