http://aluno.en.alibaba.com/product/1494348611-220150670/Good_ventilation_louver_aluminium_profile_glass_frame.html

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Our Aluno louvre window frame product can be made by aluminum/steel frame + plastic/steel clips + aluminum/steel pulling rod, and suitable for 4 inch or 6 inch glass/aluminum slats, making louvre windows which are the most economic and popular style for modern  house buildings.

In details, the material quality request: 

Outside slot hull: in aluminum alloy or steel materials with commonly width in 35mm and height in15mm , thickness is in 1.0mm or 1.2mm(marks thickness differ±0.05mm);

Glass/Aluminum Slat clips: made of the aging admixture of anti-enhancers and high class plastics, can install 150mm/100mm* 5mm glass, the other inner parts which spread to move the accessories are manufactured in sheet iron (aluminum), iron accessories are electroplated in zinc and spray coated.