... 1.Material:aluminum alloy 2.Process:die-casting 3.Size: Custom Aluminum alloy Classic Motorcycle gearbox cover1.Raw material:aluminum alloy ... ,quenching,carburizing and quenching,annealing.6.Follow-up processing: 1)Ordinary processing: cutting, deburring, sand blasting, polishing, grinding ... injection,spray pain,etc. 7.The main statement: 1)The company is a professional provide from mold manufacturing ...