... Material:aluminum alloy 2.Process:die-casting 3.Size: Custom Motorcycle engine water inlet cover1.Raw material:aluminum alloy ... requirements.2.Type:aluminum die-casting motorcycle engine water inlet cover .3.Color:silver white,offwhite,black,etc. ... 2)Machining: drilling, tapping Machining, milling etc. 3)Surface treatment:electroplating,passivation,anodic oxidation,electrophoresis,spraying,fuel ...