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The thickness of the aluminium louvers sections is usually between several millimeters and a dozen millimeters. But it will not be very thick. Different thickness will affect the intensity and weight of the shutters. The specific thickness needs to be selected according to the advice of aluminum profile manufacturers. Experienced manufacturers will recommend the appropriate thickness aluminum -type lunch according to your needs.
More information:https://www.aluextrusions.com/aluminium-louver-extrusion-profile.html