1,widely use for window and door 2,different surface treatemts 3,good quality ... :Environmental protection, Energy-saving, High strength, Heat resistance, Noise reduction, Non–corrosive, Firm and durable, Resistance aging, Long service life7. Delivery ... for choice4)OEM is welcome If you're interested in it,pls don't hesitate to contact me. aluminium extruded profile for sliding windows ...