1,widely use for window and door 2,different surface treatemts 3,good quality ... finished, Anodizing, Power coating, PVDF coating, Wooden coating, etc.2. Alloy:6063 6061 6060 3. temper:T4/T5/T6, etc4. colors ... designs for choice4)OEM is welcome If you're interested in it,pls don't hesitate to contact me. aluminium extruded profile for sliding ...