1)brass carbon brush box 2)CNC,CMM 3)ISO9001:2000,ERP management 4) ... :5x5-200x200mm 5)Ten-year OEM brass investment casting carbon brush box MaterialsCopper alloy, bronze, brass, other materials can according to ... blaster,heat treatmentInspection equipment:CMM,X-ray detector,spectrum analysis instrument,metallurgical analysis,tensile strength tester,hardness tester,projector Welcome customers ...