BALL: 52100 Bearing Steel,Heat Treated,Hard Chrome Plated,Precision Ground
RACE:
MIB: Low Carbon Steel, I.D.Protective Coated for Corrosion Resistance,Oil coated Mfr.Option-Stailess Steel, Heat Treated.
AIB: Low Carbon Steel, I.D.Protective Coated for Corrosion Resistance,Oil coated Mfr.Option-Stailess Steel, Heat Treated.
SIB: Stainless Steel,Heat Treated and Oil Coated.