... rack 3,aluminum frame 4,bended aluminum extrusion bended aluminum bar bended aluminum extrusion1,Material:mainly in 6000 grade,Such as ... 6063,6061.other alloy uponcustomer’s requirement,like Special Al alloy-1060,1070,2011,2017,2021,2024,3003 ... ,Meet the China national standard GB/T6892-2006 and Erope standard EN12020-1,2(2001) and american standard AAMA611-98.5,OEM.