... 9001 Alloy Steel Investment Casting Agricultrue Machinery Parts with Wear-resistant Part and Tow Clamp Quality System CertificateISO 9001Dimension ToleranceCT7Surface RoughnessRa6.4 ... Composition Analysis, Tensile Test, Dimension Inspection, Hardness TestingSurface TreatmentHeat Treatment, Machine, Polishing, Chrome, Zinc, Nickel PlatingPackingCartons, Wooden Case, Steel Cases, PalletsAdvantage1 ...