... /T5/ T6 6)The lengths, heights and thickness for window/door extrusion are various upon request7)Processing of ... drilling,skiving,milling,fine blanking, deburring,CNC machining, 8)Surface finishing for windows/doors: anodizing, brushing; zinc plating; sand blasting; ... treatment, hard-anodized, painting and so on9)Surface colors for aluminum window extrusion/door extrusion: natrual, matt black, green ...