The base is normally used to settle our patio umbrella and keep a good balance while in use. Our resin patio market base stand is wear-resistant and durable, capable of long-term usage. All-weather coating again expands the lifespan of this patio umbrella base. Wide compatibility upgrades the flexibility of the base, this patio umbrella base stands compatible with a 3.8cm/1.5’’, 4.8cm/1.9’’ diameter pole. Simple and universal style make this patio umbrella base stand suitable for all styles and colors. Market Standard Base: The center pole of this patio umbrella base is compatible with most market patio umbrellas that have 38mm and 48mm center pole. Rotary Knob: There is a rotary knob on the side of the center pole to settle the patio umbrella on this base stand. Premium Material: Made of long-wearing and durable resin, also featuring waterproof and UV protective. All-Weather Finish: Heavy-duty metal pole has its surface powder-coated with a waterproof and rust-resistant finish, perfect for outdoor usage. Easy to Assemble: It requires the least assembly procedure by just simply put the umbrella pole in the base pole and turning the rotary knob to fix and settle.