1.aluminum diecasting of wheel 2.pass ISO9001 certification 3.10 years mold experience 4.delivery on time an our company passed ISO9001 certificationwe have the hardness, the depth of testing instruments the product dimensional tolerances can be controlled within the range of 20-40microns, the flatness can be controlled in the range of 50-100 microns4product have no black, crack, strain, ...