1.the base tank light weight of durable plastic material,can devide four parts,water/sand filled base for stability during long time outdoor presentation. 2.giant flagpole can resist wind-force of 7 grades. 3.pole,anodized aluminium pipe,anti-corrosion and glossy silver color,capable of expansion and contraction. 4.supporter,umbrella-rib type supporters are connected to the base tank and firmly hold the pole in place.