Cantilever Umbrella Base Fillable Umbrella Holder with Wheels Patio Umbrella Base for Outdoor Umbrellas. Features: Superior Load-Bearing Design, Enhanced PP Shell, Convenient Mobility Design, Versatile Weighting Options, Specialized for Large Umbrellas. Specification: Origin: Mainland China, Main Material: PP Plastic, Product Color: Black, Product Dimensions: Approximately 86cm x 86cm x 20cm.