... .Heat treatmentHardened, NitridingHardnessHRC50~55Mould featuresAdvanced design, Logical structure, High precision, Qualified materials, Long lifetime, Short delivery time. ... ZL107.ProcessCasting, Deburring, Machining, Surface Treatment, Packing.Surface treatmentHigh quality polishing, Chrome/nickek/Zinc(white, blue, yellow, black)plating, ... to visit our company! Aluminium Die Casting Parts/Chair Base