Zeus Bearings ABEC 7
The term ABEC rating comes from is a the standard of precision a bearing is given after being put through a rigorous amount of standardized testing and inspection. This includes noise testing at high RPM, extremely tight tolerances for the internal diameter, outer diameter, roundness of ball, trueness of races, and surface finish of all of the above. These ABEC 7's will outperform other ABEC 7's on the market. They are constructed of tough heat-hardened high-carbon metal and coated with titanium for extra protection against corrosion. Pre-lubricated with our special formula of oil and grease and ready to roll right out of the package.