... )No roller axis of aluminum - black 3)Standard: GB5237-2008 Powder Coating Aluminum Alloy Roller 1)Alloy No.:6061,6063... 2)Temper ... :T3-T8 3)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 ...