... rotation - cross-line 3)Standard: GB5237-2008 Steel Roll Aluminum1)Alloy No.:6061,6063...2)Temper:T3-T83)Surface ... Treatment:1,Powder Coating 2,Anodize 3,Electrophoresis 4,Mill Finish 5,Wood Grain 6,Flourocarbon Coating 7,PVDF Coating ... wrap, string, woden case,or according to customers' need. Steel Roll Aluminum