1. Material: Aluminium alloy 6063,6061,6463,6061,6082,6060,6005 or according to customer's request2. Temper: T5, T63. Quality standard: GB5237-20084.Section ShapesI, U, T, C, Z, L, H, square, round, flat, hollow, t-slot, and other complicated shapes by custom design.5. Surface treatment: Mill finish