| 1. Windproof pressure function 5000Pa 2. waterproof function 400Pa 3. airproof function 0.6m3/m.h Material: Top aluminum alloy. Surface treatment: Powder coated, electrophoretic coating Color: Any color Glass: on customer's requested. Accessory: Domestic top grade or on customer`s requested. Packing: carton 988 series airproof sliding windows have rich choices in approximately thousand colors,middle pole of inner frame is arc,and double hollow design can endure high wind pressure. Surface of handle(double-faced) is skidproof, easy to handle.
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