Tree Pool Cover It is fabricated by Steel Grating, which has modern, simple and beautiful figure, high strength to prevent breaking. Tree Pool Cover Hollow-out rate reaches 90%, which is several times more than that of cement and cast iron cover. Good water drainage capability can allow grasses under the tree fully enjoy sun and air. Tree Pool Cover Hot-dip galvanizing surface can permanently prevent corrosion. Necessary device is designed to simplify installation and dismantling. It is widely used in municipal roads, gardens, plaza, commercial residential area, etc.