... 2)Mainly used for roof construction series 3)No roller axis of aluminum roller tube Aluminum1)Alloy No.:6061,6063...2)Temper:T3 ... shaped scraper profile, curtain wall profile, building roofing profile, finned tube profile, general profile and others6)Certificates:ISO 9001:20087)Standard ... film wrap, string, woden case,or according to customers' need. roller tube Aluminum