aluminum window 1.Finish: Anodizing,powder coating,wood colour,brushed, polishing 2.AAMA,DIN,ISO9001 aluminum windowA. Alloy: 6063/6061/6005/6060 T5/ ... brushed, mill finish availableC. Procedure: Preciously Cutting, milling, drilling, punching, CNC machiningD.Advantage:Precious machining and cutting : length tolerance can be 0.5mm ... by pre-machining in China.Any OEM is welcome. aluminum window