... alloy 2)No roller axis of aluminum - black 3)Standard: GB5237-2008 Powder Coating Aluminum Alloy Roller1) ... 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 ... case,or according to customers' need. powder coating aluminum alloy roller