... 3)energy saving 1.fan blade is special designed for top grade efficiency which made of stainless steel by punch forming. Large ... dust, attractive and durable. Thickness 1.2mm, surface finish BA grade. 2. Centrifugal system open the shutters at complete 90 degree ... power off when shortage of electricity. Motor protection grade IP55, insulation class F grade.5.Linking parts made of aluminum alloy, light ...