Adopt new-style bridge breaking technology, the panel width is 220mm, the effective width is 217mm, the whole panel thickness is 43mm, the middle polyurethane foam filling, the base plate thickness is 0.8mm, the material is 5 series 5052H32 tensile strength 238N/m2 aluminium gold manganese alloy cold bending molding, the surface adopts fluorocarbon roll coating paint surface 250 um, and the warranty is 20 years without fading.