Aluminum windows and doors can be used in the oxide film to form a composite coating adhesion paint, aluminum doors and windows, or by way of powder coating, aluminum alloy doors and windows processing, aluminum alloy with rich colors. There are as many as 256 kinds of standard color choices for consumers, which is generally monotonous white plastic materials can not match. Aluminum windows Material material: thickness. Aluminum sliding doors have 70 series, 90 series are two, inside the home of aluminum sliding doors with 70 series can be. Series number indicates the number of frame thickness mm structure size. Aluminum sliding window 55 series, 60 series, 70 series, 90 series four. Series selection should be based on the size of the window opening and local pressure on the values. Aluminum sliding window enclosed balcony used to be not less than 70 series.