all kinds of machined aluminium square tube 1.Material:Aluminum 6063 ... package etc.7.Use: industry, decoration, furniture, part of luggage etc8.Color: Silver,Golden,Black,Red,Blue and ... 5 mm,hole tolerance can be 0.05mm.2).All processes covering extruding,milling,machining and surface treatment are ... to the good quality and lead time.3).All OEM is welcome. all kinds of high quality aluminium square tube