This is a kind of Steel Galvanize Louvre, 6 inch(152mm) blades which fit 5MM louvre glass. Powder coating surface. Single bar 1.Product Description: Item: Steel( Galvanize) Louvre Window frames , no. A1 Color: Silvery or any colors with powder coated Standard type-- Material: Steel , uses the high quality cold rolled plate, surface is treated by powder coating treatment. This is ventilation type ...