The products of our company adopt the draw board imported,amd succeed through drawing manufacturing engineering high-accuratly,especially plated the chromium craft and adopted advanced low tem,perature,low density to plate the patent craft of a little crackle,the hardness can reach 900-1200HV and plate one layer of thickness >0.06mm.It is able to bear the high temperature.and it has good inboard wall of oil content and highly wear resisting,which have reduced the gritted coefficient and increased the service life.We guarantee that our product’s service life can reach 150,000km or 2years or more in case of suitable installation.Or else we will be responsible for kicking and retreating.