1 Light weight 2 High strength 3 Energy saving 4 Environment protect 5 Fast and easy installation 1 .Material: a) Top and bottom layer: uses many kinds of metal sheets b) Middle: condensed polystyrene foam board2 . Width: 1,000mm3. Thickness: 40mm, 50mm, 60mm, 75mm, 80mm, 100mm, 125mm, 150mm, 175mm, 200mm, 225mm, 250mm4 .Length: depending on the design and conditions of transp Panel:Effective ...