... Circle: Quality Standard:AS Per GBT,ASTM,and BSENGrade:1050,1060,1070,1100,1200,3003,3004,3105,5052,5083,6063,6061 ... Thickness: as your requirmetsAluminum Circle: Thickess As your requestalloy1050,1050A,1060,1100,1200,5005,8011,3003,3105,5052,5083,6063,6062 ...