... :SUJ2,Graphite,SKD11,SKH51 Hardness:60-62HRC Product:guide bushing post for dieMaterial:UJ2,Graphite,SKD11,SKH51Hardness:60-62HRCAdvantages:Experienced ... .We are mainly manufacture hardware mould componets(such as guide post,guide bushing,ball retainers ,punch etc.)according to MISUMI FUTABA ... hesitate to contact us!Our factory: misumi standard holder guide post for die and mold component manufacturer