The roller door panel is made from HI TENSILE STEEL coated with Zinculum and multi treatment coating resistance to corrosion. Easy and fast installation is derives from the excellent specially designed interlocking slat feature. Specially designed, high structural strength, lightweight slat with a range of colors to blend to match various applications. NYLON POLY GUIDE is attached along the edge on both sides to reduce friction there by a smooth and quite operation. The bottom bar incorporates a WEATHER SEAL STRIP to keep out dust, dirt and light water seepages from entering the unit.