... 3. 1 week sample for stamping 4. 14 years specialized OEM aluminum turning parts:Material: brass ,steel, Iron, copper, aluminumFinish: plating of zinc ... , blackProcess: stamping, machining, cold formingMain products: stamping parts, metal stamping, stamped parts,stamping, metal stamping parts, stamped metal partsEquipment: punching machine, lathe ,cold ...