Applications * Ceiling Diffusers * Manhole Surrounds * Ventilation & Light Diffusers Material 1.4mm extruded 6063T5 alloy. Finish Powder coat standard finish with colour options. Wet paint finishes on request. Sizes Small sizes available in Arctic White ex stock. Any size available on request. Material: 1.2 - 2mm Aluminium sheet, mill finish or powder coated, sealed to rear of louvre.