Grade:6000 Series Temper:T3-T8 Application:Door & Window Shape:Square Alloy Or Not:Is Alloy Surface treatment:Mill finish, anodizing, powder coated, sandblast, wooden grain Color:Silver, cream,white, blue, green, black, golden, champagne, bronze etc Certification:ISO9001-2008, ISO14001, SONCAP, GB5237-2008( equals to BS, AAMA, JISH)