* Elegance and beautiful shape , modern and practical design , having scientificalness and personality . Having automatic dustproof system in it , dust eliminated when the window screen operated.

* Screen Fabric: All use Phife Screen of the highest quality, which are avirulent insipidity, anti-corrosion , antiflaming, easy clean, ametabolic, longer service life.

* Spring: Material is Mn 65^{# ,} which surface is processed by Dacrolon-tech. It doesn't rust and nimble and light to use.

* Accessories: Material is PA6, excellent mechanical strength and toughness , and chemical resistance, dimension stability, low dilatation.

* Aluminum Alloy Profile: Material is 6063-T5 of high intensity. Oxidize, Heattinting, Spray powder are available. Many colors are at your choice.