... roller axis of aluminum - black 3)Standard: GB5237-2008 Powder Coating Aluminum Alloy Roller 1)Alloy No.:6061,6063... 2)Temper ... ,Anodize 3,Electrophoresis 4,Mill Finish 5,Wood Grain 6,Flourocarbon Coating 7,PVDF Coating 8,Polish 4)Coating Colour:silver, bronze, champagne, black ...