... Mould,CNC process 4. Factory price Anodized aluminium windows and doors frame (1). Alloy: 6063/6061 T5/T6 are available ... , punching, CNC machining (4).Advantage: 1)Precious machining and cutting : length tolerance can be 0.5mm, hole tolerance ... thermal-break profile with excellent energy-saving, heat resistance, sound insulation, and noise reduction. High strength, good resistance for wind pressure ...