... treatment,blacked 4 good delivery machining part1.Material:AISI4140,4142,or4340 Alloy, or other material also can be available.2.Craft: ... per customer's requirement.4.various size can be available.the parts can be manufacture according to your requirement or ... good at precise accuracy parts and ganrantee quality,the price is reasonable Material,(copperD,aluminium,stainless steel,white steel,iron,alloy ...