aluminum frame for casement window we supply you high quality products with competitive price 1) Item:aluminum frame for casement window2) Alloy Temper: 6061,6063,6060,T4/T5/T63) SurfaceTreatmen:Power Coated (colours depend on customers'requirment.)4) Hardness:Mpa≥160,HV≥58,HW≥85) Standard:GB/T5237-2004,GB/T6892-2000.6) Oxide film:AA10,UM10;AA≥15,UM≥157) Fineworkmanship,Goodcurvature, ...