Heavy duty HDPE plastic parasol base including 4pcs which is suitable all kinds of cross base .Can be filled with 60kg of water or 80kg of sand so that plates provide additional weight keeps your cantilever umbrella stable . Product nameHeavy duty HDPE plastic parasol base MaterialHDPE Size50*50*7.5CM ColorBlack G.W/N.W8.6/7.8KG/4PCS Overall Water Filled Weight:60L water Product advantages 1.Suitable for all kinds of cross base 2. Easy-to-Fill Spout: Each base plate is equipped with a spout which enables quick and easy filling, cleaning and storage of water or sand 3. Easy assembly Packing/transportation/payment method 1pc/oppbag; 4pcs/cartonWholesale Beach Umbrella Stand website:http://www.milanoutdoor.com/umbrella-base/beach-umbrella-stand/