... 4 good delivery machining part1.Material:AISI4140,4142,or4340 Alloy, or other material also can be available.2.Craft ... price is reasonable Material,(copperD,aluminium,stainless steel,white steel,iron,alloy availible)Specification,D600*H70 as exactly your needSurface treatment: ... coating,painting,baking finnish available)Accuracy,0.004mm by iron and aluminium,0.006mm by stainless steel and copperDrawings ...