1) Material: aluminum;

2) Inward or outward opening to the left or right;

3) Enhances heat and sound insulation properties;

4) Dimension: as per customer's requirements;  

5) Glass: hollow and toughened glass, submitted UK Standard;

6) Hardware: German and Hongkong hardware;

7)Strength, wind-resistance, air tightness and water tightness with higher performances