Aluminum alloy roller 1)Material:aluminum alloy 2)Mainly used for roof construction series 3)No roller axis of aluminum Aluminum Alloy Roller1)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 8,Polish 4)Coating Colour:silver, bronze, champagne, black, blue, glod and so on.5) ...