... Material:SUJ2,Graphite,SKD11,SKH51 Hardness:60-62HRC Product:guide bushing for dieMaterial:UJ2,Graphite,SKD11,SKH51Hardness:60-62HRCAdvantages:Experienced technical ... etc .We are mainly manufacture hardware mould componets(such as guide post,guide bushing,ball retainers ,punch etc.)according to MISUMI FUTABA,HASCO ... not hesitate to contact us!Our factory: misumi standard guide pin and guide bushing