The float is made by blow molding technology and can float on the water surface. It is made of strong and tough polymer polyethylene and other materials, which have good weather resistance and impact damage resistance. It can resist UV rays, freezing, seawater chemical agents, oil stains, and other erosion. It can automatically rise and fall with the rise and fall of water tide and is widely used in the construction of floating platform projects such as floating bridges and floating docks. Another type of float is a closed metal cylinder that floats on the water surface, fixed with iron anchors at the bottom, used for mooring ships or serving as navigation aids