Resin Material: The umbrella base is crafted from durable resin, boasting waterproof, aging, wear and rust resistance. It is good at keeping shape, reducing the risk of chipping or breakage, while securely supporting your umbrellas. Adjustable Design: Featuring a hand-turn tightening knob and fitting for 1.49"(38mm) and 1.89"(48mm) diameter poles. you can adjust it by your umbrella's thickness, to secure your umbrella in the base stably. Vintage Appearance: Antique cast iron exterior coupled with bronzed art deco patterns adds charm and elegance to your patio umbrella. It also adds a beautiful view to your garden while you enjoy the sunshade brought by the umbrella. Easy Assembly: Simply insert the umbrella pole with appropriate size into the base and tighten the knobs, also secure the umbrella by tightening the bottom screw and spacers. Wide Application: The umbrella base is essential to market patio umbrellas. Versatile base is ideal for gardens, patios, terraces, resorts, water parks, balconies, barbecue bars and more.