Factory Price Hard Shutter Electric Fast High Speed Aluminum Alloy Turbine Rolling Shutter Door Before sale,according to your size,our engineers will provide you with detailed CAD design solution.In order to avoid mistakes. We are quality manufacturer certified by MIC.And we have ability to provide you with safe,assured and satisfactory services. After sale,18 months warranty and spare parts will be provided. Installation technical support:Please make an appointment 24 hours in advance.