customized OEM Investment Casting / Precision Casting With ISO 9001:2008 Standard and non-standard customized OEMInvestment Casting / Precision CastingTiming pulley Standard and non-standard. Material: Carbon ... , T2.5, T5, T10, T20, 3M, 5M, 8M. Surface treatment: High frequency, black of oxidation, zincing, nickelage, anode. Machine: CNC engine ...