... material:carbon steel,alloy steel 4.OEM are welcome wheel gear for loaders Quality System CertificateISO 9001Dimension ToleranceCT7Surface ... per yearInspection Chemical Composition Analysis, Tensile Test, Dimension Inspection, Hardness TestingSurface TreatmentHeat Treatment, Machine, Polishing, Chrome, Zinc, Nickel ... tech drawing and specifications are welcomed for OEM. wheel gear for loaders