... treatment 2.good surface. 3.aluminum profile 4.high quality and best price Material6063,6060,6061,6005TemperT4,T5,T6Surface treatmentMill Finish ... requiredLength≤6mShapeRound,Square,T-slot,or as per the drawings and samplesFabricationcutting,drilling,punching,bending,etcWall thickness≥0.5mmPackageinner plastic paper ... freely. heat-insulated aluminum profile thermal-break profile for window and door