This is a package of ten 3mm Ceramic Nitride Pro Series|
Differential Balls from ACER Racing.
Ceramic Nitride construction, black in color
Grade 5 diamond polished for low rotational mass
79% lighter than Tungsten Carbide and stronger
Each pack is matched for consistent concentricity, roundness and
will not melt or shatter under extreme racing conditions
Ten 3mm diameter Ceramic Differential Balls