... )Mainly used for roof construction series 3)No roller axis of aluminum Aluminum Alloy Roller 1)Alloy No.:6061,6063... 2)Temper ... :T3-T8 3)Surface Treatment:1,Powder Coating 2,Anodize 3,Electrophoresis 4,Mill ... ,Thermal insulation production lines. 5,Fluorocarbon production lines. 6,Smoothing mill production lines. 9)Cutting Length: according to customers' need. ...