Aluminum blinds a quality is good or bad how to identify it? Uniform gap; doors or adjacent box fan and fan standing seam parallel deviation should not more than 2 mm, 1 means good aluminum doors and windows should be closed tightly. On. Open and flexible, with ease .2 sliding doors and windows, fancy smooth glide path is installed, be careful not to have a bump phenomenon, gently push the doors and windows should slide freely. Production costs zinc steel shutters is not static, the price between 50-90, why so much space, because a lot of factors zinc steel shutters costing blinds installed, the blade pitch size blinds, shutters zinc alloy size aluminum shutters, open living fan, etc., all affect the price of the blinds. We can free for everyone accounting costs zinc steel shutters, just tell us pitch a specific size of the blinds, we can accurate accounting of the cost of zinc steel shutters. Zinc steel shutters, longtai metal (certified), Macao shutters by Linqu Longtai Metal Products. Linqu Longtai Metal Products (www.wfhulan.com) Shandong Weifang, Fence, bar, network leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In longtai metal leadership with the staff warmly welcome all inquiries negotiations to create a better future longtai metal.