... Standard:GB 5237-2008 3)high-quality aluminum alloy Mechanical Special Shaped Aluminum Profile1)Alloy No.:6061,6063...2)Temper:T3 ... frames profile,window and door profile, decoration profile, mechanical special shaped profile, special shaped scraper profile, curtain wall profile, building roofing profile ... , string, woden case,or according to customers' need. mechanical special shaped aluminum profile