... ; 3) Aluminum metal building material; Door and window system used aluminum profileFeatures:1)Quality guaranteed and Good price2) Widely used in construction, ... , rods, flat bars, angles, square bars , "T" profiles, and "U" channel5)Surface finish:mill finish,powder coated,anodized,electrophoresis ... drawings, we can extruded according to your designs. Door and window system used aluminum profile