... :SAE9254,SUP12V,55Cr3,55CrSi,60Si2CrVA,SUP6. 2.Size:D1.0 - D1000*L. 3.Usage:machinery manufacturing, equipmenWe own the eight profassion ... .SUP7,SUP9 , and so on.2.Size:diametre: D1.0 - D1000*L .3.Usage:machinery,mechanical parts,instruments,auto parts and ...