... extrusion are various upon request7)Processing of aluminum extrusion windows/doors: extrusion, cutting, drilling,skiving,CNC machining ... , hard-anodized and so on9)Surface colors for aluminum windows/doors: yellow, silver, black, white,blue, natrual, ... colors upon request) 10)Features of aluminium windows/doors:Good qualityBeautiful designFashionable shape Competitive pricesOutstanding stiffness ...