... 6. Surface: Painting,polishing drawing,Film(to your order) Advantages1,High quality product2,Reasonable price3,Thoughtful service 1).Precision machining and cutting ... : length tolerance can be 0.2-0.5 mm,hole tolerance can be 0.05mm ... .2).All processes covering extruding,milling,machining and surface treatment are in the same factory to ensure to the good quality ...