1,Material: steel,stainless steel,aluminium, brass 2,customized sureface treatment 3,High QC ... spline shafts, dart shafts),gears (pinions, wheels ) bearing, bearing seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization ... the immense distance between Europe and China. small stamping part , stainless steel stamping, aluminium stamping, brass stamping