-Made of high-strength resin material waterproof aging-resistant durable enough-The powder-coated metal supporting pole is rustproof and sturdy enough-Equipped with 2 adapters suitable for most patio umbrellas with 38/48 mm/1.5"/1.9" pole diameters -Equipped with a hand-turn tightening knob for securing the umbrella on the base-Equipped with 4 360° swivel universal wheels can be easily locked or unlocked-Equipped with 2 retractable handles easy to move the stand anywhere you want-Suitable for v