Base Dimension: 35.8"L × 34.6"W × 5.5"H. Only for PURPLE LEAF 9' × 11', 10' × 10' and 9' x 12' umbrella single-top cantilever umbrellas. Sturdy Material: The patio umbrella base is made of HDPE, which is hard and weather-resistant. Large Capacity: It is recommended to add at least 73.4lbs of sand and 66.8lbs of water to keep the cantilever umbrella stable. Exquisite Craftsmanship: 3D surface design is more fashionable and textured. Considerate Customer Serivice: Please feel free to come to us if you have further problem or missing parts with this product. This PURPLE LEAF umbrella base is made of HDPE . It can be easily filled and cleaned up. Only for PURPLE LEAF 9' × 11', 10' × 10' and 9' x 12' one top cantilever umbrellas.