1.high density 2.good abrasion resistance&hardness 3.high precision 4.good strength 1.ningbo beiduo metallurgical equipment factory is ... :200T,100T,60T,25T,15T,10T,6T,3T.5.high precision,100%quality with competitive price,good abrasion resistance,high efficiency ... used in automobile,motorcycle and many other field.like transmission gear Precision gear shaft