This H&O Direct durable base comes in four separate pieces, which all can be filled with water and sand. It is designed to cooperate with the cross base by increasing its weight. Each piece is paired with a filling hole and it can weigh up to 66kg if you fill it with complete sand, which is ample to support a parasol sturdily. High-strength HDPE is adopted in this base to guarantee its excellent performance in weather and corrosion resistance.(Tip This item requires assembly - H&O Direct HDPE Cantilever Parasol Stand Water-or-Sand-Filled Umbrella Base in Black