Product Details Slats: Zinc Coated slats to the thickness of 0.70mm and 0.80mm respectively to the width of 75mm (3 inch) and 100mm (4 inch) Product Summery Slats: Zinc Coated slats to the thickness of 0.70mm and 0.80mm respectively to the width of 75mm (3inch) and 100mm (4 inch)Profile: Flat CurveSpecial feature: Specially imported hard rubber beading on side channels to minimize the rough flow of the shutter