Aluminum Die Casting Bicycle Wheel 1) Material:aluminium 2) Process:die casting ... , Nitriding HardnessHRC50~55 Mould 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, ...