Large 4 Piece Square Fillable Weighted Offset Market Patio Umbrella BaseHEAVY DUTY BASE: The package includes 4 separate base pieces that fit together over the crossbars of your umbrella stand to keep it stable and secure. STURDY MATERIAL: Made of strong and durable HDPE Plastic with a weather resistant and UV protective coating this base is perfect for outdoor use. LARGE CAPACITY: Each fillable base piece can hold approximately 44 lbs. of water or 66 lbs of sand. For best results we recommend filling with dry sand and